Question

Each square in the grid below has area 1. Find the area of the irregular quadrilateral below.

Answer 1

31.275 is the answer

Answer 2

37.5

Step-by-step explanation: 9×8 - 4×8/2 - 5×5/2 + 4×3/2 = 37.5

The whole grid area - left white triangle area - right up triangle area - right down triangle area = blue part area