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 ...