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Primary 5 Angles of a Triangle

Total questions: 11

Worksheet time: 11mins

Name
Class
Date
1.

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. ผลรวมมุมของสามเหลี่ยมระบุว่าผลรวมของมุมทั้งหมดในสามเหลี่ยมคือ ______.

a)

45°

b)

90°

c)

180°

d)

360°

2.

Calculate the size of the missing angle. Remember the sum of the 3 angles is 180 °\degree . You can add the 2 given angles and then subtract the answer from 180 °\degree

a)

55

b)

90

c)

125

d)

305

3.

Work out the size of the missing angle

a)

22

b)

202

c)

20

d)

158

4.

Work out the size of the missing angle

a)

157

b)

57

c)

23

d)

203

5.

Work out the size of the missing angle

a)

50

b)

130

c)

230

d)

40

6.

Work out the size of the missing angle

a)

45

b)

145

c)

215

d)

245

7.

Work out the size of the missing angle

a)

30

b)

70

c)

130

d)

150

8.

Work out the size of the missing angle

a)

94

b)

96

c)

86

d)

84

9.

Work out the size of the missing angle

a)

136

b)

64

c)

44

d)

144

10.

Work out the size of the missing angle

a)

155

b)

205

c)

25

d)

45

11.

Work out the size of the missing angle

a)

34

b)

134

c)

96

d)

146