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Volumes & Areas Example
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c a b Volumes and Areas a b Rectangle
Perimeter = 2a + 2b
Area = a x b
Parallelogram
Area = b x h b h a Equilateral Triangle
Perimeter = 3a
Area = (1/4) (O¨3) a 2 a h a b c Triangle
Perimeter = a + b + c
Area = (a x h) / 2 r d Circle
Circumference = 2 x p x r
Area = p r 2 AREA VOLUME Trapezoid
Perimeter = 2a + b1 + b2
Area = h/2 (b1 + b2)
b1 b2 h a r1 r2 Ellipse
Area = p r1 r2
Rectangular Block
Volume = a x b x c
Surface Area
= 2(a x b)+2(c x b)+2(a x c) Cone
Volume = 1/3 p r2 x h
= p x r x (r + (r2 + h2)1/2) h r p Cylinder
Volume = p r 2h
Surface Area =
(r x h) + 2 (p r 2) h r r d Sphere
Volume = (4/3) p r3
Surface Area = 4 p r2
Perimeter = 2a + 2b
Area = a x b
Parallelogram
Area = b x h b h a Equilateral Triangle
Perimeter = 3a
Area = (1/4) (O¨3) a 2 a h a b c Triangle
Perimeter = a + b + c
Area = (a x h) / 2 r d Circle
Circumference = 2 x p x r
Area = p r 2 AREA VOLUME Trapezoid
Perimeter = 2a + b1 + b2
Area = h/2 (b1 + b2)
b1 b2 h a r1 r2 Ellipse
Area = p r1 r2
Rectangular Block
Volume = a x b x c
Surface Area
= 2(a x b)+2(c x b)+2(a x c) Cone
Volume = 1/3 p r2 x h
= p x r x (r + (r2 + h2)1/2) h r p Cylinder
Volume = p r 2h
Surface Area =
(r x h) + 2 (p r 2) h r r d Sphere
Volume = (4/3) p r3
Surface Area = 4 p r2