Question

find the area of shaded part
step by step explainetion​

Answer 1

Answer:

425cm^2

Step-by-step explanation:

Call the upper left unshaded area A, the upper right area B, the lower left area C, the lower right area D.

Area A: 0.5 x 5 x 20 = 50

Area B: 0.5 x 5 x 20 = 50

Area C: 0.5 x 5 x 20 = 50

Area D: 0.5 x 5 x 20 = 50

Big square area: (20+5) x (20+5) = 625

Shaded = Total - Unshaded

             = 625 - 50 - 50 - 50 - 50

             = 425

Answer 2

425cm²

Step-by-step explanation:

to find the side of shaded square

Let side be s

By Pythagoras theorem

(20)² + (5)² = (s)²

400 + 25 = (s)²

425 = s²

√425 = s

For area of the shaded square

Area = s*s

= √425*√425

= 425cm²