How to use tape measure to build a house to set out a right Angle?
Rural self - built houses generally use the traditional way to find the right Angle, here with the help of the lion steel tape to find the right Angle.
1. Use hook law, hook three four string five. Make a mark at the crossing.
2. Mark off 3 meters on one side and mark off 4 meters on the other side.
3. Measure the distance between the 3m mark and the 5m mark with the male lion tape. If it is five meters, the standard right Angle is measured. If one of the lines is not moved to a five meter scale on the tape measure.