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A 180 o Protractor Outside scale from 0 o to 180 o going in a clockwise direction. Inside scale from 0 o to 180 o going in an anti-clockwise direction.

You need to be able to measure an angle to the nearest degree. To help you do this you should always: 1. Look directly down onto the cross point to improve accuracy. 2. Always use the protractor in a horizontal manner as shown below.

1 2 Measuring Angles with a 180 o Protractor 0 on the outside so use outside scale 0 on the inside so use inside scale 67 o 50 o

3 4 Measuring Angles with a 180 o Protractor 0 on the outside so use outside scale 0 on the inside so use inside scale 135 o 120 o

Measure each angle in the shapes below Rectangle Trapezium Triangle Parallelogram Pentagon Triangle 180 0

Estimating Angles

2 1

3 4

Measure each angle in the shapes below