Question

a regular pentagon is inscribed in a circle of radius 15cm. what is the length of each side of the pentagon?

Answer 1

wouldn't you just use the segment formula and use 360/5 degrees as the angle (in radians though)??

Answer 2

Yup ! did u solve it already ?

Answer 3

yes, but it isn't correct
i got the answer as approx 141, and the answer is only approx 17...

Answer 4

you need to solve the other side in that isosceles triangle

Answer 5

is it right if i did 0.5*15^2 (1.2566-sin1.2566)
the answer comes to around 34 now...

Answer 6

how would you do that?

Answer 7

isn't that using the segment formula"?