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2. 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.

3. 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.

4. 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

5. 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

6. Measure each angle in the shapes below. 1 23 4 5 6 90 0 112 0 68 0 67 0 46 0 73 0 107 0 90 0 42 0 48 0 110 0 101 0 118 0 Rectangle 360 0 Trapezium 360 0 Triangle 180 0 Parallelogram 360 0 Pentagon 540 0 Triangle 180 0

7. Estimating Angles 1 2 3 4 5 6

8. 2 1

9. 3 4

10. Measure each angle in the shapes below. 1 23 4 5 6