Revision sheet

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Prisms and cylinders

$V = Bh$ ; cylinder $V = \pi r^2 h$ .

Watch out: base area, not circumference.

Pyramids and cones

$V = \tfrac{1}{3}Bh$ .

Watch out: do not forget the ⅓.

Spheres and density

$V = \tfrac{4}{3}\pi r^3$ ; density = mass/volume.

Watch out: $r^3$ for volume, $r^2$ for area.

Percent error

Error ÷ actual × 100.

Watch out: divide by the actual value, not the measured one.

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