Answer:
C 459cm2
Step-by-step explanation:
You multiply the area of the square first and add that to the area of the two right triangles.
Area of the square - Bh = 22(18) = 396
Area of ONE right triangle - 1/2bh h = 7 b = the base of the triangle
Look at the bottom of the square (18 cm) and divide that by two to get the base of the triangle
1/2(9)(7) = 31.5
Area of BOTH right triangles - 31.5(2) = 63
Total Area - Then you add 396 to 63 and you get 459 cm2, or C, which is the answer
