Hello llkkjj24

Welcome to Math Help Forum!(a) All angles at O are equal, because the hexagon is regular. Therefore

, radii

Therefore (isosceles triangle)

Therefore (angle sum of triangle)

Therefore is equilateral.

Using , its area =

So area of hexagon .

Area of circle

(b) Therefore the area of the minor segment

(c) Arc

So the perimeter of this segment

Grandad