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1/2 (h) (b1+b2)
1/2 (h) (b)
x squared, root 3 OVER 4
square root of s * (s-a) (s-b) (s-c)
1/2 (P) (a)
2 pi (r)squared + 2 pi (r) (h)
pi (r)squared + pi (r) (L)
center of regular polygon
The point of intersection of the perpendicular bisectors of the sides
The perpendicular distance from the center to a side of a regular polygon.
From center to a point on the circle.
area of regular polygon theorem
area of a regular polygon is half the product of the apothem and the perimeter