The figure below shows a circular prop with two triangles labeled ABC and AOC made on it. The center of the prop is labeled O.

What is the area of the cloth required to make the circular prop?

12.24 ft2
15.19 ft2
25.13 ft2
50.29 ft2

Question

The figure below shows a circular prop with two triangles labeled ABC and AOC made on it. The center of the prop is labeled O.

What is the area of the cloth required to make the circular prop?

                12.24 ft2    
		15.19 ft2    
		25.13 ft2
		50.29 ft2

happykiddo · Answer

attachment

anonymous · Answer

AOC is an isosceles right triangle. Hypotenuse = 4ft.

Find the length of each leg (radius of circle). Then use that to find area of circle.

happykiddo · Answer

oh i see what you mean :D thanks

happykiddo · Answer

but how do you know angle AOC is a right triangle

anonymous · Answer

Because ABC = 45 degrees and AOC = 2 times ABC = 90 degrees. It is one of those "circle" theorems.

happykiddo · Answer

gotcha thanks

anonymous · Answer

is the answer 25.13??