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Geometry Formulas

Formulas for Chapter 11: Polygons and Circles

WordFormula
Sum of interior angles 180(n-2)
One interior angle 180(n-2)/n
Sum of exterior angles 360
Area of an equilateral triangle 1/4*s^2*√3
Area of a polygon 1/2a(n*s)
Arc Length c(mArc/360)
A of a sector (pizza slice) (mArc/360*πr^2
Area of the shaded Area of the outside-Area of inside
Circumference dπ or 2rπ
Area of a circle πr^2
Area of a parallelogram B*H
Area of a triangle 1/2(B*H)
Area of a trapezoid 1/2(B1+B2)H
Area of a rhombus (kite) (D1*D2)/2
Created by: willonidas97
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