What you’ll learn
Find missing right-triangle sides.
Key idea
Use addition of leg squares for a missing hypotenuse and subtraction from the hypotenuse square for a missing leg.
Add squares for a missing hypotenuse, subtract from its square for a missing leg, then take positive root.
Worked example
Enter the exact value or ordered values in the format requested below.
Right-triangle legs are 28,96 units. Enter the exact numerical hypotenuse length.
- Right-triangle relation gives c²=28²+96²=10000, so positive hypotenuse c=100.
- For a missing other leg, b²=100²-28²=9216, so positive b=96.
Answer: 100
Quick Check
Evaluate a worked attempt at find missing right-triangle sides, identify the first invalid step, and provide the correction.
Find hypotenuse for right-triangle legs 3,4: Step 1 computes square sum 25. Step 2 reports 25 as side length. Locate the first invalid step and correct the length.