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Use Plywood to Check Your Square

There are so many tools out there that claim to help you measure out perfect shapes and lines. But when it comes down to it, these tools often leave room for human error. So, if you're looking to draw a perfect square, you might want to go back to the drawing board and find something else to help you out. And that something definitely should be a piece of factory-processed plywood!

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This plywood should have a perfectly straight edge, so you can use that to draw the shorter side of your square shape. Then, mark a line down the long side, and flip the whole thing. If your lines match, you have a perfect square!