Q1 of 95 Page 15

In a parallelogram ABCD, write the sum of angles A and B.

Given,


In parallelogram ABCD


∠A+∠B = 180° (Adjacent angles of a parallelogram are supplementary)


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19

Show that the line segments joining the mid-points of the opposite sides of a quadrilateral bisect each other.

 20

Fill in the blanks to make the following statements correct:

(i) The triangle formed by joining the mid-points of the sides of an isosceles triangle is…..


(ii) The triangle formed by joining the mid-points of the sides of a right triangle is…..


(iii) The figure formed by joining the mid-points of consecutive sides of a quadrilateral is……

 2

In a parallelogram ABCD, if ∠D=115°, then write the measure of ∠A.

 3

PQRS is a square such that PR and SQ intersect at O. State the measure of ∠POQ.