Question

The area of rectangle ABCD below is 30 cm².

What is the area of the shaded portion?​

Answer 1

The area of shaded portion is 15cm^2

Explanation:

Since the length of corresponding side of the rectangle are equal

AB = CD

AD = BC

So, △ABD ≌ △BCD

the area of shaded portion

= area of △ABD

= half of the area of rectangle

= 1/2 ✖ 30cm^2

= 15cm^2