Draw A Perfect Circle With A Speed Square

Draw a Perfect Circle with a Speed Square

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]


    American combination of try square and 45 degree set square. Never seen one in Australia, but they might be around in specialty tool shops.

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