Areas of Plane Figures

Areas of Plane Figures 

A = Area

H = Height

R = Radius

P = Perimeter

p = π

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Triangle

A=bh/2

P = A + B + C

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Circle

A = π R2 P = 2 π R

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Ellipse

       

            

              

A = π ab

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Segment

A = p R2D/3600 - R2 sinD/2

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Sector

A = π R2 ⱷ/3600

P = 2R + ⱷ/3600 (2 π R)

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Fillet

A = RT – D/l 360 l * π R2

When : D = 900, A = 0.2146R2

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Parallelogram

A = bh

A = ah’

P = 2(a+b)

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Trapezoid

A =  (a + b * h) / 2

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Circular Ring

A = π /4(D2 –d2)

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