The chapter 11 of Class 9 is Constructions. We provide step-by step guide for all the questions in a simple way which helps students to understand the chapter better. The chapter covers the topic of basic constructions and constructions of triangle.
The word “construction” refers to the drawing of various shapes, lines and angles as per the dimensions in an accurate manner. The constructions of these objects are made with the help of a pencil and a ruler. Basically in Geometric constructions there are no numbers required or provided. Some of the common forms of construction are
- Bisector of a given angle
- Construction of a perpendicular bisector of a given line segment
- Construction of angles at any given point in a ray
The other important topic which is covered under NCERT Solutions For Class 9 Maths Chapter 11 PDF is construction of triangles. The major topics under this subheading are
- Rules of congruency of triangles
- Uniqueness of triangle
Important constructions which are covered under NCERT Solutions For Class 9 Maths Chapter 11 PDF are
- Constructing a triangle based on the given base, base angle and sum of two sides of a triangle
- Constructing a triangle based on the given base, base angle and difference of other two sides of a triangle
Constructing a triangle based on the given perimeter, its two base angles
