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 ...
People with poor sight can't use rulers. Or rather they can't use them easily. Try adding a magnifying glass to the mix when you're already trying to balance a pencil and a ruler in a tricky nook ...
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