2. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Question? Alternative Beta version Trigonometry Part 3

3. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What is the missing angle? 40 ° 50 ° 60 ° 70 °

4. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What is the missing angle? 100° 110° 120 ° 130 °

5. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What is the missing angle? 55° 75° 100 ° 125 °

6. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What is the missing angle? 40° 100° 140 ° 180 °

7. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version BONUS ROUND! Just pick the lucky colour RED GREEN BLUE YELLOW

8. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What have you found out about angles in a triangle? Use what you know in your group to work out the answer. You can do any working out in your maths book.

9. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version Work out the value of angle x. 80° 100° 90° 110°

10. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version Work out the value of angle x. 50° 77° 53° 80°

11. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version Work out the value of angle x. 40° 80° 60° 90°

12. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version BONUS ROUND! Just pick the lucky colour RED GREEN BLUE YELLOW

13. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version The next question could win MASSIVE points for the group with the lucky number.

14. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What type of triangle is this? Equilateral Isosceles Scalene Right-Angled

15. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What is the value of angle x?. 140° 40° 100° 20°

16. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What is the value of angle x?. 30° 140° 70° 180°

17. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What is the value of angle x?. 40° 120° 60° 180°

18. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version BONUS ROUND! Just pick the lucky colour RED GREEN BLUE YELLOW

19. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version BONUS ROUND! Just pick the lucky colour RED GREEN BLUE YELLOW Write down any angle facts that you have learnt over the last three lessons.

20. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version Now use what you have learnt to solve the following problems. You will need to think carefully about which fact or facts to use.

21. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What is the size of angle x? 50 ° 60 ° 70 ° 80 °

22. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What is the size of angle x? 50 ° 80 ° 100 ° 150 °

23. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version What is the size of angle x? 40 ° 55 ° 95 ° 105 °

24. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version BONUS ROUND! Just pick the lucky colour RED GREEN BLUE YELLOW

25. 1 2 3 4 5 6 7 8 9 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1   Beta version CONGRATULATIONS !!! to the winners. Commiserations to the rest of you – better luck next time!