Calculate Knee Brace Length Using Pythagorean Theorem

0:38

1:30

23.5K views

At 0:38 in

Knee bracing explained

Watch on YouTube

What happens here

To find the precise length of the knee brace, the Pythagorean theorem (A² + B² = C²) is applied. The 'A' and 'B' sides of the right triangle are the 12-inch measurements marked on the post and beam. So, calculate 12² + 12² = 144 + 144 = 288. Then, find the square root of 288, which is approximately 16.97 inches. The presenter advises rounding this up slightly to 17 inches for cutting the brace, noting that 16.97 inches is just a '32nd short of 17 inches'. This calculated length 'C' is the hypotenuse, which represents the length of the knee brace.

Goal: Determine the accurate length for the knee brace.

Tools and materials

Calculator Unspecified — Performing the Pythagorean theorem calculation
Whiteboard with calculations Unspecified — Visual aid for explaining the calculation

What they say

(368 characters)

Hide

this measurement. So, to figure out this angle, we're going to do a little bit of math and that's where this comes in. We've all learned this in school. So, we have 12 in squared equals 144 plus 12 in squared, which is 144. So, 144 plus 144 equals 288. Now, the square root of 288 is 16.97. It's a 30 seconds short of 17 in. So, go ahead and cut your bracing at 17 in.

Auto-generated from the video audio.