1. Parallel lines and angles Starter : 1. Write a definition of parallel lines and draw an example of them. 2. For the following: a) Draw a sketchb) Calculate xc) Explain why c/w 14.03.13 82°74° x 40° 84° 2x 30° 82° 121° x 152 ° 79° 2x 65° i)ii) iii) iv) v) Extension: Calculate x 50° 2x 4x x 3x

2. Parallel lines and angles c/w 14.03.13 Parallel lines are... always the same distance apart and are two lines that will never meet We show them like this:

3. Parallel lines and angles Parallel lines are... always the same distance apart and are two lines that will never meet We show them like this: c/w 14.03.13

4. Parallel lines and angles Parallel lines are... always the same distance apart and are two lines that will never meet We show them like this: c/w 14.03.13 The arrows on the lines tell us they’re parallel

5. Investigation Fill out the 6 ‘angle fact’ sheets measuring the angles to investigate the rules. ANGLE FACT 1 Angles on a straight line add up to 180° a b c SO: a + b + c = 180° Step by step Guide: 1. Measure all the angles using your protractor 2. Find examples in the diagrams of: - Angles at a point - Angles in a triangle - Corresponding angles - Alternate angles - Opposite angles 3. What does this tell you? Fill out the angle fact sheets.

6. What angle fact was used? Hold up the angle fact card that you would use to calculate the missing angles...

8. a = 93 o b

9. c

10. b = 99 o d

11. e

12. a = 124 o f

13. g

14. h

15. i 109°

16. j

17. k