Volume Formulas and Surface Area of 3D Shapes
Volume and surface area formulas for cubes, boxes, cylinders, cones, spheres and pyramids, why they work, unit conversions and examples.
Tag: geometry
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Special Right Triangles: 45-45-90 and 30-60-90 Rules
The 45-45-90 and 30-60-90 special right triangles: side ratios, where they come from, how to find missing sides, exact trig values and practice problems.
Pythagorean Theorem: Formula, Proof and Examples
The Pythagorean theorem a² + b² = c² explained: finding the hypotenuse or a leg, a visual proof, Pythagorean triples, the converse, 3D and real-world examples.
Area Formulas for Every Shape (with Examples)
Area formulas for squares, rectangles, triangles, parallelograms, trapezoids, rhombuses, circles, sectors and ellipses, why each works, and worked examples.