The Pythagorean Theorem in Everyday Life

How to use the pythagorean theorem in everyday life Example: setting up a terrace along a house precisely without surveyor's tools.

• A decameter (I use metric unit)
• A line
• litlles poles

I use excalidraw for diagrams

First, you take a measurement of 3 meters along the house.

From one of the extremities of the measurement you draw an arc of a circle of 4 meters.

From the other end of the measurement of 3 meters, you draw an arc of a circle of 5 meters

thanks to the pythagorean theorem you get a right angle as indicated in the diagram.

Just repeat the last step to get a rectangle

I call this rule: the 3-4-5 rule

But it is valid for example for: 1.5-2-2.5