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Which of the following quadrilaterals is not a parallelogram?

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Important Questions on Understanding Elementary Shapes

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All squares are quadrilaterals.


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A quadrilateral with opposite sides (Only one pair) parallel is called _____.

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Identify the figure given below.

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In a square all the sides are _____. (equal/unequal)

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Name of the following quadrilateral.

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Identify the figure as triangle and quadrilateral. Give reasons.

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A _____ is a kind of parallelogram.

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Name of the following quadrilateral.

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A square can be thought of as a special rectangle.

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Use strips and fasteners to make a triangle and a quadrilateral.
Try to push inward at any one vertex of the triangle. Do the same to the quadrilateral.
Is the triangle distorted? Is the quadrilateral distorted? Is the triangle rigid?
Why is it that structures like electric towers make use of triangular shapes and not quadrilaterals?

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In the figure, the midpoints of the diagonals of a rhombus are joined to form a small quadrilateral:
Prove that this quadrilateral is a rhombus.

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A quadrilateral in which diagonals are not equal but bisect each other at is called _____.
