Grade 8 • Unit 8

Free Pythagorean Theorem Practice

Master a² + b² = c² with adaptive practice. Find missing sides of right triangles and solve real-world distance problems.

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Finding the HypotenuseQuestion 1 of 3
A right triangle has legs of length 3 and 4.

What is the length of the hypotenuse?
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Frequently Asked Questions

What is the Pythagorean theorem?

The Pythagorean theorem states that in a right triangle, a² + b² = c², where a and b are the legs and c is the hypotenuse (the longest side, opposite the right angle). This relationship only works for right triangles.

How do you find a missing side using the Pythagorean theorem?

To find the hypotenuse: c = √(a² + b²). To find a leg: a = √(c² - b²). Square the known sides, add or subtract as needed, then take the square root of the result.