Windows only: Measure photos, graphics and other digital media directly on your monitor with freeware app JR Screen Ruler. JR Screen Ruler comes as a stand-alone executable that can be used to measure ...
What you need: ruler, protractor, pencil and paper. Use these to construct a triangle when you know the length of 1 side and the 2 angles at each end of it. In this case use the length 8 cm, and the ...
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