Angles in a Triangle Lesson

Angles in a triangle

Multiple Choice

Work out the size of the missing angle

• 50

• 70

• 100

• 130

Multiple Choice

Work out the size of the missing angle

• 45

• 135

• 55

• 35

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

Multiple Choice

Calculate x

• 81º

• 82º

• 83º

• 93º

Multiple Choice

Calculate x

• 63º

• 43º

• 53º

• 33º

Multiple Choice

What is the value of angle a?

• 150

• 140

• 130

• 40

Multiple Choice

What is the value of angle a?

• 230

• 60

• 260

• 240

Multiple Choice

What is the value of angle a?

• Not enough information

• 65

• Vertically Opposite

• 115

Multiple Choice

Classify this triangle by its sides and its angles.

• obtuse scalene

• equilateral equiangular

• acute right

• right isosceles

Multiple Choice

Classify this triangle by its sides.

• equilateral

• scalene

• isosceles

Multiple Choice

Classify this triangle by its sides.

• equilateral

• scalene

• isosceles

• right

Multiple Choice

What is the missing angle?

• 10

• 50

• 55

• 90

Multiple Choice

Work out the size of the missing angle

• 22

• 202

• 20

• 158

Multiple Choice

Find the measure of the missing angle.

• 47

• 57

• 53

• 133

Multiple Choice

Which of the following could be angle measures for a triangle?

A 120°, 50°, 20°

B 100°, 200°, 60°

C 30°, 50°, 80°

D 40°, 50°, 90°

• A

• B

• C

• D

Please start your independent work that is given on Google classroom

Multiple Choice

Find the measure of the angle x.

• 105
• 115
• 65
• 75

Multiple Choice

Find the angle sum of the interior angles of the polygon.

• 180° 
• 540° 
• 720° 
• 1080° 

Multiple Choice

What is the SUM of the angle measures in a hexagon (6 sides)?

• 720°
• 1080°
• 600°
• 540°

Multiple Choice

What is the SUM of the angle measures in a nonagon (9 sides)?

• 1440°

• 900°

• 1080°

• 1260°