Shapes & geometry
Area, volume, circles, triangles and slopes.
Areas and volumes for every common shape, each with the formula written out beside the answer.
- Area Area of a rectangle, circle or triangle, in several units, with the formula.
- Circle Radius, diameter, circumference and area — give any one, get the rest.
- Perimeter The distance round a rectangle, square, circle or triangle.
- Pythagoras Find the missing side of a right-angled triangle.
- Slope Slope, distance and midpoint between two points.
- Triangle Area and all three angles from three sides — no height needed.
- Volume Volume and surface area of a cube, box, cylinder, sphere, cone or pyramid.