Maths Chapter 12: Constructions

Front 1

1.Compass :

Back 1

An instrument with pointed end

the other end with a

loop to

fix pencil is

used to draw

circles and arcs

Front 2

2. Protractor :

Back 2

An instrument in the

shape of a semicircle

in geometry box is used

measuring and

for drawing angle

Front 3

3.Set square :

Back 3

Two pieces like triangle

in geometry box

are used to draw a

parallel lines

Front 4

4.Divider :

Back 4

An instruments with

two pointed ends in

geometry box used

to measure the length

of the segment

Front 5

5.Diameter :

Back 5

Segment joining any

two points and

passing through the

centre of the circle

Front 6

6.Bisect :

Back 6

To divide into two equal parts

Front 7

7.Scale :

Back 7

Scale is used for drawing

segments and

measuring the

shortest distance

Front 8

8.Concentric :

Back 8

Circles with common centre

Front 9

Bisector :

Back 9

A line or segment

which divides the given

segment into two equal

parts

Front 10

Replica :

Back 10

An exact copy