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An easy way to remember volume formulae is to group 3-D shapes into categories; pointed, linear and spheres.
1. Pointed
- These shapes all have a point or tip
- e.g Cones, triangular-based pyramids, square-based pyramids
- Volume = 1/3 x B x h
B = area of side (base) opposite the tip
h = perpendicular height from base to tip
2. Linear
- These shapes are all 3-D extensions of 2-D shapes.
- e.g Cylinders, cuboids, prisms,
- Volume = B x h
B = area of base
h = height perpendicular to base
3. Spheres
- Volume = 4/3 x π x r^3
r = radius
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