### Practical Geometry - Revision Notes

CBSE Class 6 Mathematics

Revision Notes

CHAPTER – 14

Practical Geometry

This chapter deals with methods of drawing geometrical shapes.

- We use the following mathematical instruments to construct shapes:

- A graduated ruler
- The compasses
- The divider
- Set-squares
- The protractor

- Using the ruler and compasses, the following constructions can be made:

- A circle, when the length of its radius is known.
- A line segment, if its length is given.
- A copy of a line segment.
- A perpendicular to a line through a point

(a) on the line

(b) not on the line. - The perpendicular bisector of a line segment of given length.
- An angle of a given measure.
- A copy of an angle.
- The bisector of a given angle.
- Some angles of special measures such as

(a) 90o (b) 45o (c) 60o (d) 300 (e) 120o (f) 135o