1. Revising Basic Angles Naming Angles Calculating Missing angles Angles in a Triangle Corresponding Angles Alternate Angles Angles

2. Learning Intention Success Criteria 1.To be able to identify acute, right-angle, obtuse, straight line and reflex angles. 1.To revise Type of Angles from level D. Type of Angles

3.  Acute less than 90 o Obtuse Between 90 o – 180 o Right Angle exactly 90 o reflex over 180 o less than 360 o Straight Line Angle exactly 180 o Type of Angles Horizontal Vertical

4. Learning Intention Success Criteria 1.To be able to name an angle. 1.To explain how we name angles by THREE capital letters with the angle sign. The middle letter being where the angle is. 2.Understand the difference between the type of angle and the name of an angle. Naming Angles

5.  A B C Type of angle is acute Name of angle is ∠ ABC Type of angle is obtuse Name of angle is ∠ ZYX X Y Z MIDDLE LETTER IS ALWAYS WHERE THE ANGLE IS ALWAYS 3 CAPITAL LETTERS

6. Learning Intention Success Criteria 1.To know 360 o in a circle. 1.To calculate missing angle give all other angles. 2.Find missing angle given all other angles. Find Missing Angles

7.  120 o 95 o Find Missing Angle Angles round a point always add up to 360 o 65 o Two angles making a straight line add up to 180 o (Supplementary angles) Angles opposite each other at a cross are equal. 34 o 115 o 146 o 146 o 145 o 35 o Two angles making a right angle add up to 90 o (Complementary angles) 55 o

8. 75 o xoxo

9. Learning Intention Success Criteria 1.To know all angles in a triangle add to 180 o. 1.To show that all the angles in a triangle sum to 180 o. 2.Use knowledge to solve problems.

10. To determine the angle sum of any Triangle Cut off corners 

11. Sum of angles in ANY Triangle All angles in a triangle ALWAYS added up to180 o 180 o

12. Copy out the following triangles and find the missing angles. 32 o 50 o 38 o 87 o xoxo xoxo xoxo xoxo Remember all the angles add up to 180 o

13. Learning Intention Success Criteria 1.To understand the term corresponding angles. 1. To explain the term corresponding angles and show how we use the property to solve problems. 2. To be able to use property to solve problems. Angles Corresponding Angles

14. Look for F shapes Angles Alternate Angles = equal angles

15. Angles Corresponding Angles Which angles are equal?

16. Angles Corresponding Angles Which angles are equal?

17. Angles Corresponding Angles Which angles are equal to the shaded angle?

18. Angles

19. look for shapes Angles Corresponding Angles

20. 120 x Angles What is the value of letter x? Corresponding Angles

21. 100 a Angles What is the value of letter a? Corresponding Angles

22. 48 b Angles What is the value of letter b? Corresponding Angles

23. 110 c Angles What is the value of letter c? Corresponding Angles

24. 70 a b 110 What are the values of letters a and b? Angles Corresponding Angles

25. 115 65 115 65 What are the values of the missing angles? Angles Corresponding Angles

26. 57 123 57 123 What are the values of the missing angles? Angles Corresponding Angles

27. What are the values of the missing angles? Angles Corresponding Angles 115 o 140 o 65 o 115 o 40 o 140 o 75 o

28.  Starter Questions Q1.Solve the equation below Q2.Find two numbers that multiply to give 48 and divide to give 3. Q3.Find missing angles 119 o aoao bobo

29. Learning Intention Success Criteria 1.To understand the term alternate angles. 1. To explain the term alternate angles and show how we use the property to solve problems. 2. To be able to use property to solve problems. Angles Alternate Angles

30. Look for - Z shapes Angles Alternate Angles = equal angles

31. 35 a Angles Alternate Angles Find the value of a ?

32. b 43 Angles Alternate Angles Find the value of b ?

33. 33 c Angles Alternate Angles Find the value of c ?

34. 123 d Angles Alternate Angles Find the value of d ?

35. 50 ab13050 Angles Alternate Angles Find the value a and b ?

36. 135 c 45 d Angles Alternate Angles Find the value of c and d ?

37. 120 60 a b c120 60 Angles Alternate Angles Find the value a, b and c ?