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?

Answer 1

@ash2326

Answer 2

@radar

Answer 3

12.56637061435917 is this the answer?

Answer 4

That is 4 pi, but I don't know how that solved it lol, in fact I can't figure out the "round propeller"

Answer 5

oh

Answer 6

Sorry i'm not much help on this one.

Answer 7

It's ok :)

Answer 8

@ParthKohli

Answer 9

That is 4 pi, but I don't know how that solved it lol, in fact I can't figure out the "round propeller"

Answer 10

@Zarkon

Answer 11

@AccessDenied

Answer 12

I know that angle O is 90 degrees but idk where to go from there :)

Answer 13

The triangle including that angle is also isosceles, because we have two radii of the same circle.
Maybe that will help. :P

Answer 14

Then we have an isosceles triangle with a 90 degree angle vertex, which means that he other two angles are 45 (isosceles triangles have equal angles at the base, and they're complementary because the vertex is already 90, they add up to 180)