The formula for area of a square is length times width. For a triangle, it’s 1/2 times base times height.
7x7=49 for the square base.
1/2x7x9=31.5 for a triangle
Multiply the triangle by 4 since there’s 4 triangles.
31.5x4=126
Now add them together.
126+49=175 cm^2
Hope this helps!
