# What Is the Formula for Calculating a Right-Angled Triangle?

Last Updated Apr 4, 2020 1:55:38 AM ET

**The formula for calculating the length of one side of a right-angled triangle when the length of the other two sides is known is a ^{2} + b^{2} = c^{2}.** This is known as the Pythagorean theorem.

In this formula, c represents the longest side of a triangle, known as the hypotenuse. The a and b represent the two other sides. For right-angled triangles, the square of the hypotenuse is always equal to the sum of the squares of the other two sides. The square is calculated by multiplying the value of one side by itself. As long as the length of any two of the sides is known, the third can be calculated using the Pythagorean theorem.

More From Reference

Will 5G Impact Our Cell Phone Plans (or Our Health?!)

The Secret Science of Solving Crossword Puzzles

Racist Phrases to Remove From Your Mental Lexicon

Is the Coronavirus Crisis Increasing America's Drug Overdoses?

Fact Check: What Power Does the President Really Have Over State Governors?

Festival of Sacrifice: The Past and Present of the Islamic Holiday of Eid al-Adha