RD SharmaSolutions for Class 9 Maths Chapter 17 Constructions
"Construction" in Geometry means to draw shapes, angles or lines accurately. These constructions use an only compass, straightedge (i.e. ruler) and a pencil. It is the "pure" form of geometric construction: no numbers involved! These constructions are considered as a pure form of geometric constructions since no other measuring devices like protractors are used. Euclid used this method of construction for various basic constructions including bisecting a line, drawing different angles, constructing shapes like triangles, etc. This chapter helps students understand basic constructions, construction of standard angles and construction of triangles.