Student Reader

Geometry

Circle

Area = π r2

Circumference = 2 π r

Sphere

Area = 4 π r2

Volume = 43 π r3

Cylinder

Curved (Lateral) Area = 2 π r l

Volume = π r2 l

Trapezoid

Area = Average Height × Average Length = ½ ( h1 + h2 ) × ½ ( l1 + l2)

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