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Formula Sheet — Units 4 & 5

Reference

The formulas allowed on the Units 4 & 5 quiz and final. The Notes / Examples column is yours — fill it in (on screen or on paper) with your own worked example for each shape.

P = Perimeter — the distance around a 2D shape A = Area — the space (square units) inside a 2D shape V = Volume — the space (cubic units) inside a 3D figure
Perimeter & Area — 2D shapes
ShapeFormulasNotes / Examples
Volume — 3D figures
ShapeFormulasNotes / Examples

Tip: π ≈ 3.14159. Use the height (straight line), not the slanted side. r is the radius (centre to edge); diameter = 2r.