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2D Shapes

r

Circle

Area = πr²

Circum = 2πr

s

Square

Area = s²

Perim = 4s

h

Triangle

Area = ½bh

Perim = a+b+c

Parallelogram

Area = bh

Perim = 2(a+b)

3D Shapes

Sphere

Volume 4/3 πr³

Surface Area 4πr²

Cylinder

Volume πr²h

Surface Area 2πrh + 2πr²

Cone

Volume 1/3 πr²h

Surface Area πr(r + √(h²+r²))

Rectangular Prism

Volume l × w × h

Surface Area 2(lw + lh + wh)