Page 10 - Key Stage 3 Geometry
P. 10
The Protractor
This has two roles, firstly to
create an angle of required size,
and secondly, to measure an
angle between two lines.
The Compasses
An instrument for drawing
circles and arcs. The pencil
found in the tin slides into
the opening and is fixed into position by rotating the
screw against the pencil.
o
A 45 Set Square
Although it’s called a set
square, it is not square,
although it does have
one right angle. You will
notice it also has a metric
scale in cm and also the imperial scale in inches. Very
convenient for drawing a right angle or an angle of
o
45 .
4
