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Level 89

Formulas for Area of Regular Polygons


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Trapezoid
1/2 (h) (b1+b2)
triangle
1/2 (h) (b)
equilateral triangle
x squared, root 3 OVER 4
Scalene Triangle
square root of s * (s-a) (s-b) (s-c)
regular polygon
1/2 (P) (a)
cylinder
2 pi (r)squared + 2 pi (r) (h)
cone
pi (r)squared + pi (r) (L)
center of regular polygon
The point of intersection of the perpendicular bisectors of the sides
Apothem
The perpendicular distance from the center to a side of a regular polygon.
radius
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