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School supplies. Measuring tool. Transparent plastic protractor on white and sheet in a cell. Drawing device is an arc divided into degrees to measure the angles and apply them to the drawing ...

A technician often has to sketch or design ductwork and the other parts of an HVAC system. Sometimes you have to sketch the room or building you are working with. This means working with lines, angles ...

A scalene triangle has 3 sides of different lengths and 3 unequal angles. An isosceles triangle has 2 sides of equal length. The dashes on the lines show they are equal in length. The angles at the ...