Question

"Question 1 Given a parallelogram ABCD. Complete each statement along with the definition or property used. (i) AD = … (ii)∠DCB = … (iii) OC = … (iv) m∠DAB + m∠CDA = …

Class 8 Understanding Quadrilaterals Page 50"

Answer 1

Quadrilateral:

The closed figure formed by joining four non collinear points in an order is called a quadrilateral

Parallelogram :

A quadrilateral in which both pairs of opposite sides are parallel is called a parallelogram.

                                           

The sum of the adjacent sides of a parallelogram is 180°.

A quadrilateral is a parallelogram if

i)Its opposite sides are equal

ii) its opposite angles are equal

iii) diagonals bisect each other

iv) a pair of opposite sides is equal and parallel.

 

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Solution:

(i) AD = BC   (Opposite sides of a parallelogram are equal)

(ii) ∠DCB = ∠DAB (Opposite angles of a parallelogram are equal)

(iii) OC = OA    (Diagonals of a parallelogram are equal)

(iv)  m ∠DAB + m ∠CDA = 180∘ (Adjacent angles in a parallelogram are supplementary)

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Hope this will help you....

Answer 2

Answer:

you have already marked as brain lisht someone but I am a intelligent boy then I can also give your answer AD equal to six centimeter because IN PARALLEL