3-4-5 is a very convenient measurement to check because of the low, whole numbers. The math checks out: 32 + 42 = 9 + 16 = 25 = 52.
You can multiply each number by the same amount and still use this. Try 30-−40–50 centimeters (−16–20 in) if using the metric system. For a large room, use 6-8-10 or 9-−12–15 feet (−3. 7–4. 6 m) or meters. [1] X Research source
If the distance is less than 5 units, your corner is less than 90º. Move the sides apart. If the distance is over 5 units, your corner has a measurement of more than 90º. Bring the sides closer together. You can use a framing square as a guide when you do this. Once you’ve got a square corner, you can check the room’s other three corners to ensure they’re the same.
