Radius is a line segment that joins the center of a circle with any point on its circumference.
He told you! Btw smart a$$ There IS a radius of a SQUARE. You are STUPID.
And btw the answer is 6
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Surface area = 4*pi*72 = 615.752 square feet to 3 dp
72 because if the area is 324 and you make a block chart and count the sides it will equal 72
72/4 = 18. Each side of the square is 18, so 18 x 18 = 324. 324 is the area.
72
A 72-inch diameter circle has an area of: 28.3 square feet.