Triangle Formulas
What Is the Formula for a 90-Degree Triangle? Pythagorean Theorem Explained

Learn the formulas for solving 90-degree triangles, including the Pythagorean theorem and special angle triangles (45°-45°, 30°-60°).

45-45-90 Triangles
How to Find Missing Side Lengths in a 45-45-90 Triangle: Step-by-Step Guide

Learn how to quickly find missing side lengths of a 45-45-90 triangle using the 1:1:√2 ratio with clear examples.

45-45-90 Triangles
How to Find Side Lengths of a 45-45-90 Triangle: Step-by-Step Guide

Learn how to calculate the side lengths of a 45-45-90 triangle using the special properties of this right triangle.