# Ex 10.2, 1 - Chapter 10 Class 7 Practical Geometry

Last updated at Oct. 1, 2018 by Teachoo

Last updated at Oct. 1, 2018 by Teachoo

Transcript

Ex 10.2, 1 Construct ∆XYZ in which XY = 4.5 cm, YZ = 5 cm and ZX = 6 cm. First we draw a rough sketch We follow these steps Steps of construction 1. Draw a line segment XY of length 4.5 cm 2. Taking 6 cm as radius, and X as center, draw an arc. 3. Taking 5 cm as radius, and Y as center, draw another arc. Let Z be the point where the two arcs intersect Join XZ and YZ and label the sides Thus, Δ XYZ is the required triangle

Constructing a triangle when 3 sides known (SSS)

Chapter 10 Class 7 Practical Geometry

Concept wise

- Construction of line parallel to given line, through point not on line
- Constructing a triangle when 3 sides known (SSS)
- Constructing a triangle when 2 sides and angle between is known (SAS)
- Constructing a triangle when 2 angles and side between is known (ASA)
- Constructing a right triangle when hypotenuse and side is given (RHS)

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.