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.
https://www.connexus.com/content/media/532465-1182011-110442-AM-321962674.jpg
What is the area of the cloth required tomake the circular prop?

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.
https://www.connexus.com/content/media/532465-1182011-110442-AM-321962674.jpg
What is the area of the cloth required tomake the circular prop?

anonymous · Answer

BUT the AC IS 4 FEET NOT 5!!! answer choices below:
12.24 ft2    
15.19 ft2    
25.13 ft2
50.29 ft2

zepp · Answer

There will be a lot of explanations, are you ready? :)

anonymous · Answer

YES:)

zepp · Answer

Ok, let's go! :)
Our goal would be to find the radius of this prop, centered at O, therefore we are going to find the measure of OC (or OA, both are)

But let's take a look at this triangle:
|dw:1340389128537:dw|