Triangle Theorem Breakdown
What Is the 45-45-90 Triangle Theorem and How Does It Work?

Learn the 45-45-90 triangle theorem: equal legs and a hypotenuse equal to leg × √2 in these special right triangles.

Equal Legs Triangle
Are Both Legs Equal in a 45-45-90 Triangle? Explained

Learn why both legs in a 45-45-90 triangle are equal, and how this property defines the isosceles right triangle.