Question

In parallelogram ABCD, AB=7cm and the perimeter of ABCD is 30cm. What is the length of AD?

Answer 1

8cm

Explanation:

Ab=7cm

Since opposite sides are equal

Cd=7cm

7cm + 7cm = 14cm

Perimeter equals 30cm

:.30cm - 14cm =16cm (bc+ad)

Since both bc and ad are equal,

16cm/2=8cm

:.ad=8cm