Understand Element Shapes
Category : 6th Class
Understanding Elementary Shapes
1 Revolution = 1 Complete angle
1 Straight angle \[=\frac{1}{2}\](Complete angle)\[=\frac{1}{2}\]\[\times \]
\[{{360}^{o}}\]= \[{{180}^{o}}\]
(ii) Obtuse Angle: An angle between \[{{90}^{o}}\]and \[{{180}^{o}}\]is called an obtuse angle.
(iii) Reflex Angle: An angle between \[{{180}^{o}}\]and \[{{360}^{o}}\]is called a reflex angle.
(b) Rectangle: A parallelogram whose each angle measures 90°.
(c) Rhombus: A parallelogram with all sides equal.
(d) Trapezium: A quadrilateral with one pair of opposite sides parallel.
(e) Square: A rhombus with 4 right angles.
Space figure (Three – dimensional)
S. No. |
Name the figure |
Figure |
Description |
Components |
Examples |
1. |
Cuboid |
|
A Cuboid resembles a rectangular box. |
Face : 6 Edges :12 Vertices :8 |
|
2. |
Cube |
|
A cube is a cuboid whose edges are all of equal length. |
Face : 6 Edges :12 Vertices :8 |
|
3. |
Triangular prism |
|
A triangular prism resembles a kaleidoscope. It has triangular bases. |
Face : 5 Edges : 9 Vertices :6
|
|
4. |
Triangular pyramid or Tetra - hedron |
|
It has a triangular base.
|
Face : 4 Edges : 6 Vertices : 4 |
|
5. |
Square Pyramid |
|
It has a square as its base.
|
Face : 5 Edges : 8 Vertices : 5 |
|
6. |
Cylinder |
|
It has a circular base of radius \['r'\] and height \['h'\].
|
radius \['r'\] slant height \['l'\] Perpendicular height \['h'\] |
|
7. |
Cone |
|
It has a circular base of radius \['r'\] and height \['h'\].
|
radius \['r'\] slant height \['l'\] Perpendicular height \['h'\] |
|
8. |
Sphere |
|
No flat face. |
radius \['r'\] Face : 1 Edges : 0 Vertices : 0 |
|
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