24 Pack plastic protractors: math protractor features an open center and accurate 6 inches ruler across the base; 24 Pack can meet the needs, and adequate to use for a long time Measure range ...

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 ...

Well, you’d better dust off your protractor because the most traditional way of measuring a mountain’s height most definitely does involve some trig skills.

The mathematics collections document the stories of several of these objects individually, including pens and pencils, dividers and compasses, squares and triangles, protractors, parallel rules, ...