Q97 of 160 Page 144

State whether the statements are true (T) or false (F).

Sum of all the angles of a quadrilateral is 180°.

FALSE

Sum of all the angles of a quadrilateral is 360°.


Because ,the quadrilateral can be divided into 2 triangles and sum of angles of each of the triangles is 180°.


⸫ when we join these 2 triangles to get back the original quadrilateral then the sum of all the angles of the quadrilateral is sum of angles of both the triangles ie. 180°(sum of angles of triangle1) + 180° (sum of angles of triangle2) = 360° (sum of angles of quadrilateral)



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95

State whether the statements are true (T) or false (F).

All rectangles are parallelograms.

 96

State whether the statements are true (T) or false (F).

All rhombuses are squares.

 98

State whether the statements are true (T) or false (F).

A quadrilateral has two diagonals.

 99

State whether the statements are true (T) or false (F).

Triangle is a polygon whose sum of exterior angles is double the sum of interior angles.