The Pythagorean Theorem Made EASY | Right Triangle Math
Need a fast math hack for right triangles? In this video, we’ll use the Pythagorean Theorem (a² + b² = c²) to find a missing side in a triangle. Watch the step-by-step example with numbers 5, 8, and x, and see how squaring, adding, and taking the square root gives the hypotenuse instantly. This trick works for ANY right triangle—perfect for homework, test prep, or quick math practice.
In this quick and easy tutorial, we'll demonstrate how to find the missing side of a right triangle using the Pythagorean Theorem. With the given leg lengths of 5 and 8, we’ll show step-by-step how to apply the formula a² + b² = c² to solve for the hypotenuse. By squaring the leg lengths, adding them together, and taking the square root, we'll find the missing hypotenuse length is approximately 9.43. Perfect for students and math enthusiasts alike, this video makes solving right triangles simple and straightforward. Watch now and master the Pythagorean Theorem!
In the calculator: we will square the two legs then add. Then square root the sum.
0:00 – Intro: Right triangle with missing side
0:02 – Pythagorean Theorem explained (a² + b² = c²)
0:07 – Identifying legs and hypotenuse
0:12 – Plugging in 5 and 8 for the legs
0:14 – Squaring and adding (25 + 64 = 89)
0:21 – Solving for x² = 89
0:25 – Taking the square root
0:27 – Approximating √89 ≈ 9.43
0:29 – Final missing side