1. Entry Activity – Find 
a) 90 – 50 =  h)90 - = 10
b)90 – 40 =  i) 180 - = 50
c) 180 – 100 =  j) 90 - = 80
d)180 – 55 =  k) 180 - = 150
e) 90 – 18 =  l) 90 - = 15
f) 90 – 32 =  m)180 - = 32
g) 180 – 48 =  n)90 - = 47

2. Entry Activity – Find 
a) 90 – 50 =  h)90 - = 10
b)90 – 40 =  i) 180 - = 50
c) 180 – 100 =  j) 90 - = 80
d)180 – 55 =  k) 180 - = 150
e) 90 – 18 =  l) 90 - = 15
f) 90 – 32 =  m)180 - = 32
g) 180 – 48 =  n)90 - = 47

3. Today I will learn to identify the number of
degrees in right-angles, on a straight line and
round a point Level 4+
Challenge Objective: To solve problems relating
to angles in a right-angle, on a straight line and
round a point Level 5
Key Words
• Angle
• Degree
• Right-angle
• Straight-line

4. Today I will learn to identify the number of degrees in
right-angles and on a straight line Level 4
Reflex angle
More than 90˚ but less than 180˚
Less than 90˚
Right-angle
Straight-line 180˚
90˚ More than180˚
Obtuse angle Acute angle

5. Today I will learn to identify the number of degrees in
right-angles and on a straight line Level 4
90˚
Straight-line 180˚
Right-angle
More than 180˚
Less than 90˚
Reflex angle Obtuse angle
Acute angle
More than 90˚ but less than 180˚

6. To solve problems relating to angles in a
right-angle and on a straight line Level 5

7. To solve problems relating to angles in a
right-angle and on a straight line Level 5
5˚
40˚
70˚
10˚
41˚
45˚ 52˚
35˚

8. To solve problems relating to angles in a
right-angle and on a straight line Level 5

9. To solve problems relating to angles in a
right-angle and on a straight line Level 5
100˚
60˚ 125˚
80˚ 102˚
25˚
95˚ 112˚ 66˚

10. Today I will learn to identify the number of
degrees in right-angles, on a straight line and
round a point Level 4+
Challenge Objective: To solve problems relating
to angles in a right-angle, on a straight line and
round a point Level 5
Key Words
• Angle
• Degree
• Right-angle
• Straight-line

11. Level 5
Extension

12. Today I will learn to identify the number of
degrees in right-angles, on a straight line and
round a point Level 4+
Challenge Objective: To solve problems relating
to angles in a right-angle, on a straight line and
round a point Level 5
Key Words
• Angle
• Degree
• Right-angle
• Straight-line

13. To calculate angles round a point Level 5

14. To calculate angles round a point Level 5

15. To calculate angles round a point Level 5
Extension

16. I can identify the number of degrees in
right-angles Level 4
I can identify the number of degrees on
a straight line Level 4
I can identify the number of degrees
round a point Level 4
I can solve problems relating to angles
in a right-angle Level 5
I can solve problems relating to angles
on a straight line Level 5
I can solve problems relating to angles
round a point Level 5