CBSE · Class 6-12

Class 6 · Ganita Prakash

Unit 8 · Class 6Ganita Prakash

Playing with Constructions

Geometric constructions using a compass and a ruler.

Lessons

4 concepts

1
Basic Tools
Compass has two arms — one with point, one with pencil. Set spread to draw arcs of that radius.
2
Copying a Segment
Place compass on $A$ , pencil on $B$ . Move to $A'$ , arc gives $B'$ with $A'B' = AB$ .
3
Perpendicular Bisector
From $A$ and $B$ : draw arcs above and below (same radius). Join the intersections — cuts $AB$ perpendicularly at midpoint.
4
Angle Copying
Arc across the original angle. Repeat arc on new line. Measure chord between arc-arm points; transfer. Join to form copy.

Skills to practise

Skill · medium

Playing with Constructions — Practice