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