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

October 22, 2014 · 1 min · 51 words · Thomas Simpson

Aspeed squarehas many obvious uses for marking up your building materials.

Here’s a small hidden feature you may not know about: it can alsodraw perfect circles.

Most speed squares have a notch at the 90 degree corner which is used to determine angles.

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