3-4-5 is a method used to do what?

3-4-5 is a method used to do what?

• A. Measure
• B. Square
• C. Align
• D. Cut

Answer: (B)

The method is used to establish a right angle and square a layout. Because 3-4-5 forms a Pythagorean triple, a triangle with legs 3 and 4 has a hypotenuse of 5, which corresponds to a perfect 90-degree corner when the two legs meet. In practice, you lay out along one direction 3 units and along a perpendicular direction 4 units, then connect those end points. If the distance between those end points is exactly 5 units, the angle at the corner is square. This provides a quick, reliable check for perpendicularity, making it the go-to technique for squaring corners in paving layouts.

The method is used to establish a right angle and square a layout. Because 3-4-5 forms a Pythagorean triple, a triangle with legs 3 and 4 has a hypotenuse of 5, which corresponds to a perfect 90-degree corner when the two legs meet. In practice, you lay out along one direction 3 units and along a perpendicular direction 4 units, then connect those end points. If the distance between those end points is exactly 5 units, the angle at the corner is square. This provides a quick, reliable check for perpendicularity, making it the go-to technique for squaring corners in paving layouts.