Calculating angles

Calculating angles

To be able to calculate angles

Equipment you need today

• Maths book

• Pencil

• Ruler

• Calculator

• Coloured pen or highlighter

Angles on straight lines add up to 180 $\degree$  

Multiple Choice

Work out the size of the missing angle

• 65

• 130

• 50

• 70

Multiple Choice

Work out the size of the missing angle

• 50

• 70

• 100

• 130

Multiple Choice

Work out the size of the missing angle

• 95

• 85

• 75

• 45

Multiple Choice

Work out the size of the missing angle

• 25

• 55

• 125

• 205

Multiple Choice

Work out the size of the missing angle

• 35

• 65

• 115

• 118

Angles around a point at up to 360 $\degree$  

Multiple Choice

Calculate x

• 63º

• 267º

• 93º

• 193º

Multiple Choice

Calculate x

• 81º

• 82º

• 83º

• 93º

Multiple Choice

Calculate x

• 149º

• 141º

• 221º

• 91º

Multiple Choice

Calculate x

• 63º

• 43º

• 53º

• 33º

Multiple Choice

What is the value of angle a?

• 150

• 140

• 130

• 40

Multiple Choice

Is this diagram correct ?

• Yes

• No - because they don't add up to 360⁰

• No - because they don't add up to 180°

Multiple Choice

What is the value of angle a?

• 230

• 60

• 260

• 240

A right angle adds up to 90 $\degree$  

Multiple Choice

What is the value of angle a?

• 30

• 90

• 25

• 60

Multiple Choice

What is the value of angle a?

• 15

• 25

• 105

• 20

Multiple Choice

What is the value of angle a?

• 30

• 150

• 70

• 60

Opposite angles are equal

Multiple Choice

Find the missing angle b.

• 47

• 43

• 137

Multiple Choice

• x = 105°

• x = 180°

• x = 95°

• x = 85°

Multiple Choice

What is the value of x?

• 53

• 67

• 57

• 133

Multiple Choice

Find the angle at x

• 105

• 75

• 180

• 85

Time to check understanding

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

What is the value of angle a?

• Not enough information

• 65

• Vertically Opposite

• 115

Multiple Choice

What type of angle is shown?

• acute
• obtuse
• right
• straight

Multiple Choice

Identify the type of angle shown....

• Acute

• Obtuse

• Reflex

• Right Angle

Multiple Choice

Right, acute, or obtuse?

• Acute
• Right
• Obtuse

Multiple Choice

This is what kind of angle?

• obtuse
• right
• straight
• acute

Multiple Choice

Find the missing angle.  Find x.

• 20^o
• 70^o
• 160^o
• 180^o

Multiple Choice

• x = 118

• x = 108

• x = 28

• x = 58

• x = 62

Poll

How do you feel about today’s lessons?

• I understand

• I would like to practice more

• I only understood some of this lesson

• I didn’t really understand angles.