A speed square has many obvious uses for marking up your building materials. Here’s a small hidden feature you may not know about: it can also draw perfect circles.
Photo by HomeHacks
Most speed squares have a notch at the 90 degree corner which is used to determine angles. To draw a circle using this notch you just need to place a nail at the centre of your desired circle and then put your notch on the nail. Using a pencil, walk the speed square around the nail to draw a circle. Neat, hey?
Draw Circles Without a Protractor [HomeHacks]
Comments
4 responses to “Draw A Perfect Circle With A Speed Square”
Piece of string does the same
Ah you beat me to it!!
Speed square?
American combination of try square and 45 degree set square. Never seen one in Australia, but they might be around in specialty tool shops.