각도 표시? 어렵지 않아요 ^^
Angles Made Easy
ZigZag is a seemingly regular ruler with a twist! When we’re trying to draw a triangle, we usually use a triangle ruler, however, it usually offers a fixed degree. This concept combines the triangle, protractor, and traditional ruler to achieve a variety of commonly used degrees. Simply place one end of the ruler into the predefined slots on the other side to get the angle you need!
Designer: Snežana Jeremić
source : Angles Made Easy
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