Question

The area of the green square is 9ft. The area of the yellow square is 25 ft.

What is the area of the red square (labelled "b" in the diagram)?


A)5 ft²
B)16 ft2
C)81 ft2
D)128 ft2

Answer 1

B

Explanation:

a²+b²=c²

3²+b²=5²

b²=5²-3²

b²=25-9=16 answer is 16