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Year 8 - Angles in Triangles

Total questions: 10

Worksheet time: 6mins

Name
Class
Date
1.

Find the missing angle!

a)

91

b)

81

c)

89

d)

99

2.

Find the missing angle!

a)

37

b)

46

c)

47

d)

57

3.

Find the missing angles!

a)

90, 45

b)

90, 35

c)

100, 100

d)

45, 45

4.

Find the missing angle!

a)

45

b)

55

c)

65

d)

75

5.

Find the missing angle!

a)

33

b)

44

c)

55

d)

66

6.

 In ΔPQR P = 70°, Q = 65° In\ \Delta PQR\ \angle P\ =\ 70\degree,\ \angle Q\ =\ 65\degree\  

 then find R.then\ find\ \angle R.   

a)

35

b)

40

c)

50

d)

45

7.

The measures of angles of a triangle are   x° , (x 20)°, (x40)°. \ x\degree\ ,\ \left(x\ -20\right)\degree,\ \left(x-40\right)\degree.\   


Then find the value of x.

a)

80

b)

60

c)

75

d)

40

8.
A triangle has side lengths of 19 centimetres, 19 centimetres, and 20 centimetres. Is this triangle equilateral?

a)
equilateral triangle
b)
isosceles triangle  
c)
scalene triangle
d)
none of the above
9.
Find the measure of the indicated angle. 
a)
95
b)
85
c)
35
d)
45
10.
Find the measure of the indicated angle. 
a)
26
b)
36
c)
85
d)
144