How to Find the Area of Common Shapes
Area formulas for rectangles, triangles, circles, trapezoids and parallelograms, with worked examples, units explained and common mistakes.
Geometry
3 guides.
The Pythagorean Theorem with Worked Examples
Use a² + b² = c² to find any side of a right triangle, check for right angles, and find distances on a grid. Worked examples and common mistakes.
Volume and Surface Area: The Formulas You Actually Need
Volume and surface area formulas for cubes, cuboids, cylinders, cones, spheres and pyramids, with worked examples and the one-third rule explained.