10th Class Mathematics Triangles Question Bank

done Case Based (MCQs) - Triangles Total Questions - 35

• question_answer1)

  Direction: Q. 1 to 5

  Sanjeev wants to measure a garden during the visit to his native. He marks points P and Q on the opposite edges of a garden as shown in the figure.

  To find the distance between the points, he makes a right-angled triangle using rope connecting Q with another point R at a distance of \[\text{4m},\] connecting R to point 5 at a distance of \[\text{15m}\] from point R and connecting S to the point P which is at a distance of \[\text{8m}\] from S such that triangle PRS is a right angled triangle with \[\angle S=90{}^\circ \].

  Based on the above information, give the answer of the following questions:

  Which property of geometry will be used to find the distance PR?
  A)
  Similarity of triangles done clear
  B)
  Thales theorem done clear
  C)
  Pythagoras theorem done clear
  D)
  Area of similar triangles done clear
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• question_answer2)
  What is the distance (PQ) of garden?
  A)
  \[10\,m\] done clear
  B)
  \[11\,m\] done clear
  C)
  \[12\,m\] done clear
  D)
  \[13\,m\] done clear
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• question_answer3)
  What is the distance PR?
  A)
  \[12\,m\] done clear
  B)
  \[17\,m\] done clear
  C)
  \[10\,m\] done clear
  D)
  \[9\,m\] done clear
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• question_answer4)
  Find the Length of the rope used.
  A)
  \[26\,m\] done clear
  B)
  \[25\,m\] done clear
  C)
  \[27\,m\] done clear
  D)
  \[23\,m\] done clear
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• question_answer5)
  Which of the following forms a Pythagoras triplet?
  A)
  \[(5,11,13)\] done clear
  B)
  \[(9,15,18)\] done clear
  C)
  \[(17,24,25)\] done clear
  D)
  \[(20,21,29)\] done clear
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• question_answer6)

  Direction: Q. 6 to 10

  Anika is studying in class X. She observe two poles DC and BA. The heights of these poles are x m and y m respectively as shown in figure below:

  These poles are z metres apart and O is the point o:

  intersection of the lines joining the top of each pole to the foot of opposite pole and the distance between point 0 and L is a Few questions came" to his mind while observing the poles Give answer to his questions by looking at figure.

  Which is the correct similarity criteria applicable in \[\Delta CAB\] and \[\Delta CLO\]?
  A)
  AA done clear
  B)
  SSS done clear
  C)
  SAS done clear
  D)
  RHS done clear
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• question_answer7)
  If \[\text{CL}=\text{a},\]then find o In terms of x, y and d.
  A)
  \[\frac{xd}{z}\] done clear
  B)
  \[\frac{xz}{d}\] done clear
  C)
  \[\frac{zd}{x}\] done clear
  D)
  \[xzd\] done clear
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• question_answer8)
  If \[\text{AL}=\text{b},\]then find b in terms of x, y and d is:
  A)
  \[\frac{zd}{y}\] done clear
  B)
  \[\frac{yd}{z}\] done clear
  C)
  \[xyd\] done clear
  D)
  \[xzd\] done clear
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• question_answer9)
  Find d in terms of x and y.
  A)
  \[\frac{x+y}{xy}\] done clear
  B)
  \[\frac{xy}{x+y}\] done clear
  C)
  \[xy\] done clear
  D)
  \[\frac{x}{y}\] done clear
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• question_answer10)
  If \[\text{x}=\text{7 m}\] and \[\text{y}=\text{1}0\text{ m},\]then find d.
  A)
  \[\frac{30}{13}m\] done clear
  B)
  \[\frac{50}{17}m\] done clear
  C)
  \[\frac{70}{17}m\] done clear
  D)
  \[\frac{90}{19}m\] done clear
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• question_answer11)

  Direction: Q. 11 to 15

  Gaurav placed a light bulb at a point O on the ceiling and directly below it placed a table. He cuts a polygon, say a quadrilateral PQRS, from a plane cardboard and place this cardboard parallel to the ground between the lighted bulb and the table. Then a shadow of PQRS is cast on the table as P’Q’R’S. Quadrilateral P'Q'R'S' is an enlargement of the quadrilateral PQRS with scale factor \[\text{1}:\text{3}\] Given that \[\text{PQ}=\text{2}.\text{5cm},\] \[\text{QR}=\text{3}.\text{5 cm}\]. \[\text{RS}=\text{3}.\text{4 cm}\] and \[\text{PS}=\text{3}.\text{1 cm};\] \[\angle P=115{}^\circ ,\] \[\angle Q=95{}^\circ ,\] \[\angle R=65{}^\circ \]and \[\angle S=85{}^\circ \].

  Based on the given information, give the answer of the following questions:

  The length of R'S' is:
  A)
  \[\text{3}.\text{4 cm}\] done clear
  B)
  \[\text{1}0.\text{2 cm}\] done clear
  C)
  \[\text{6}.\text{8 cm}\] done clear
  D)
  \[\text{9}.\text{5 cm}\] done clear
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• question_answer12)
  The ratio of sides P'Q' and Q'R' is:
  A)
  \[\text{5}:7\] done clear
  B)
  \[7:5\] done clear
  C)
  \[7:2\] done clear
  D)
  \[2:7\] done clear
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• question_answer13)
  The measurement of angle Q’ is:
  A)
  \[115{}^\circ \] done clear
  B)
  \[95{}^\circ \] done clear
  C)
  \[65{}^\circ \] done clear
  D)
  \[85{}^\circ \] done clear
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• question_answer14)
  The sum of the length Q'R' and P'S' is:
  A)
  \[\text{12}.\text{3 cm}\] done clear
  B)
  \[\text{6}.\text{7 cm}\] done clear
  C)
  \[\text{19}.\text{8 cm}\] done clear
  D)
  \[\text{9 cm}\] done clear
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• question_answer15)
  The sum of angles of quadrilateral P'Q'R'S' is:
  A)
  \[180{}^\circ \] done clear
  B)
  \[270{}^\circ \] done clear
  C)
  \[300{}^\circ \] done clear
  D)
  \[360{}^\circ \] done clear
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• question_answer16)

  Direction: Q. 16 to 20

  There is a staircase as shown in figure, connecting points A and B. Measurement of steps are marked in the figure. Give answers of the following questions by looking at the figure.

  The common angle in each staircase is:
  A)
  \[30{}^\circ \] done clear
  B)
  \[60{}^\circ \] done clear
  C)
  \[90{}^\circ \] done clear
  D)
  nothing done clear
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• question_answer17)
  Which is the correct similarity criteria applicable for staircase II and III?
  A)
  RHS done clear
  B)
  SAS done clear
  C)
  SSA done clear
  D)
  AAS done clear
  View Solution play_arrow

• question_answer18)
  Which concept is used to find the distance between A and S?
  A)
  Pythagoras theorem done clear
  B)
  Thales theorem done clear
  C)
  Converse of Thales theorem done clear
  D)
  Converse of pythagoras theorem, done clear
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• question_answer19)
  The straight line distance between A and B is:
  A)
  \[\sqrt{5}+\sqrt{6.56}+\sqrt{6.56}+\sqrt{7.24}\] done clear
  B)
  \[\sqrt{5.15}+\sqrt{6.21}+\sqrt{6.21}+\sqrt{7}\] done clear
  C)
  \[\sqrt{5}+\sqrt{6}+\sqrt{6}+\sqrt{7}\] done clear
  D)
  None of the above done clear
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• question_answer20)
  The sum of the area of each staircase is:
  A)
  6 square unit done clear
  B)
  12 square unit done clear
  C)
  10 square unit done clear
  D)
  None of these done clear
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• question_answer21)

  Direction: Q. 21 to 25

  Nazima is fly fishing in a stream. The tip of her fishing rod is \[\text{1}.\text{8 m}\] above the surface of the water and the fly at the end of the string rests on the water \[3.6\text{ m}\]away and \[2.4\text{ m}\] from a point directly under the tip of the rod. Assuming that her string (from the tip of her rod to the fly) is taut, answer the following questions given below:

  How much string does she have out?
  A)
  \[1\,m\] done clear
  B)
  \[1.5\,m\] done clear
  C)
  \[2.5\,m\] done clear
  D)
  \[3\,m\] done clear
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• question_answer22)
  If she pulls in the string at the rate of \[\text{5 cm}/\text{s}\] then the Length of the string pulled in 12 seconds is:
  A)
  \[0.\text{6 m}\] done clear
  B)
  \[1.\text{6 m}\] done clear
  C)
  \[0.8\text{ m}\] done clear
  D)
  \[1.2\text{ m}\] done clear
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• question_answer23)
  Length of the remaining string left out after 12 seconds is:
  A)
  \[1.2\text{ m}\] done clear
  B)
  x done clear
  C)
  done clear
  D)
  done clear
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• question_answer24)
  The distance of fly at the end of the string from the point over the water surface just below the tip of fishing rod, after 12 seconds is:
  A)
  \[\text{1}.\text{2 m}\] done clear
  B)
  \[\text{2}.\text{52 m}\] done clear
  C)
  \[\text{1}.\text{59 m}\] done clear
  D)
  \[\text{2}.\text{79 m}\] done clear
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• question_answer25)
  The horizontal distance of the fly from Nazima after 12 seconds is:
  A)
  \[1.2\,m\] done clear
  B)
  \[\text{2}.\text{52 m}\] done clear
  C)
  \[\text{1}.\text{59 m}\] done clear
  D)
  \[\text{2}.\text{79 m}\] done clear
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• question_answer26)

  Direction: Q. 26 to 30

  Two buildings I and II are of heights \[\text{19 m}\] and \[\text{4}0\text{ m}\] respectively \[20\text{ m}\] apart.

  Based on the above information, give the answer of the following questions:

  The distance between their tops can be found out by using which of the following theorems?
  A)
  Similarity of triangles done clear
  B)
  Converse of Pythagoras Theorem done clear
  C)
  Thales Theorem done clear
  D)
  Pythagoras Theorem done clear
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• question_answer27)
  The distance between their tops i.e., Length of AB is:
  A)
  \[\sqrt{1961}\,m\] done clear
  B)
  \[\sqrt{802}\,m\] done clear
  C)
  \[29\,m\] done clear
  D)
  \[41\,m\] done clear
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• question_answer28)
  In a \[\Delta ABC,\] \[BD\bot AC\] such that \[B{{D}^{2}}=DC.\] AD, then :
  A)
  \[\angle A=90{}^\circ \] done clear
  B)
  \[\angle B=90{}^\circ \] done clear
  C)
  \[\angle C=90{}^\circ \] done clear
  D)
  ABC is not a right angled triangle done clear
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• question_answer29)

  In the given figure, the side PQ of a right triangle \[\Delta PQR\]where \[\text{OP}=\text{6 cm},\] \[\text{OR}=\text{8 cm}\] and \[\text{QR}=\text{26 cm},\]is :

  A)
  \[21\,cm\] done clear
  B)
  \[23\,cm\] done clear
  C)
  \[24\,cm\] done clear
  D)
  \[36\,cm\] done clear
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• question_answer30)
  Hypotenuse of a right triangle is \[\text{25 cm}\] and out of the remaining two sides, one is longer than the other by \[\text{5 cm}\]. Then the length of the longer side is:
  A)
  \[20\,cm\] done clear
  B)
  \[15\,cm\] done clear
  C)
  \[12.5\,cm\] done clear
  D)
  \[10\,cm\] done clear
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• question_answer31)

  Direction: Q. 31 to 35

  The Louvre Pyramid (Pyramide du Louvre) is a large glass and Chinese- American architect I.

  M. Pei, surrounded by three smaller pyramids, in the maincourtyard (Cour Napoleon) of the Louvre Palace (Palais du Louvre) in Paris. The large pyramid serves as the main entrance to the Louvre Museum.

  Completed in 1989., it has become a landmark of the city of Paris. As can be seen, two triangles ABC and DEF have been marked in the image, where \[\left. DE \right\|AB\] and \[\left. EF \right\|BC\].

  Based on the given information, give the answer of the following questions:

  Which of the following is not a criteria for similarity of two triangles?
  A)
  SSS done clear
  B)
  ASA done clear
  C)
  SAS done clear
  D)
  AA done clear
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• question_answer32)
  Select the correct statement from the statements given below:
  A)
  \[\Delta ABC\tilde{\ }\Delta DEF\] by SSS similarity criterion done clear
  B)
  \[\Delta ABC\tilde{\ }\Delta DEF\] by SAS similarity criterion done clear
  C)
  \[\Delta ABC\tilde{\ }\Delta EDF\] by AA similarity criterion done clear
  D)
  \[\Delta ABC\tilde{\ }\Delta DEF\] by AA similarity criterion done clear
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• question_answer33)
  If the measures of sides AB, BC and DE are \[\text{15 m},\] \[\text{21 m},\] and \[\text{10 m}\] respectively, then measure of side EF is:
  A)
  \[\text{14 m}\] done clear
  B)
  \[\frac{50}{7}\text{ m}\] done clear
  C)
  \[\text{12 m}\] done clear
  D)
  \[\text{7 m}\] done clear
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• question_answer34)
  In relation to the part \[(3),\] the ratio of sides \[\text{DF}:\text{AC}\] is:
  A)
  \[2:5\] done clear
  B)
  \[5:2\] done clear
  C)
  \[2:3\] done clear
  D)
  \[3:2\] done clear
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• question_answer35)
  In relation to the part \[(3),\] the ratio of areas of triangles ABC and DEF is:
  A)
  \[9:4\] done clear
  B)
  \[3:2\] done clear
  C)
  \[4:9\] done clear
  D)
  \[2:3\] done clear
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