H S Hall

A short preliminary course of practical and experimental work in geometry to give the beginning student clear mental pictures of geometric objects and constructions. Early chapters introduce easy exercises in drawing to illustrate definitions, measurement of lines and angles, and the use of compasses and protractor. Next come problems on bisection, parallels, and perpendiculars, followed by the use of set squares and the construction of triangles and quadrilaterals. Problems are explained informally, with the results verified by measurement.