Area calculation: 30 inches by 30 inches = (30 x 30) square inches =900 square inches or, if you want square feet instead: 12 inches x 12 inches (1 square foot) = 144 square inches Take your 900 square inches and divide by 144 to get square feet. 900 / 144 = 6.25 square feet
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b and h both equal 30 (square); area = 30 X 30 = 900 SQ IN
30 inches because 0.5*30*8 = 120 square inches
12*5=60. 60/2 is 30. The answer is 30 sq. inches.
Perimeter = 100 inches Area = 600 square inches
The radius is 30 inches.