A regular octagon is inscribed in a circle with radius 5. Find the area of the octagon.
The octagon will be formed 8 congruent isosceles triangles with equal sides of 5 and an included angle of 45°
The area of the octagon is
8 (1/2) (5^2) sin (45°) =
100 ( sqrt (2) / 2) =
50 sqrt (2) units^2
never mind
I misread the text !!!
Phill's answer's correct!!!
