A) Rectangle
B) Square
C) Parallelogram
D) Trapezium
Correct Answer: B
Solution :
[b] Let \[A=(1,1,1);B=(-2,4,1):C=(-1,5,5)\] & \[D=(2,2,5)\] Then, \[AB=\sqrt{9+9+0}=3\sqrt{2},BC=\sqrt{1+1+16}\] \[=3\sqrt{2}\] and \[CD=3\sqrt{2}\] and \[AD=3\sqrt{2}\]. Since, all sides are equal. Hence it is a square.You need to login to perform this action.
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