WorksheetsClassifying Triangles & Finding Missing Angles
Total questions: 71
Worksheet time: 2hrs 54mins
Name
Class
Date
1.
What type of triangle is this?
a)
Equilateral
b)
Isosceles
c)
Scalene
d)
Obtuse
2.
How many acute angles must an acute triangle have?
a)
2
b)
1
c)
4
d)
3
3.
What type of triangle is this?
a)
scalene
b)
acute
c)
equilateral
d)
isosceles
4.
a)
A
b)
B
c)
C
d)
D
5.
a)
A
b)
B
c)
C
d)
D
6.
.
a)
A
b)
B
c)
C
d)
D
7.
a)
A
b)
B
c)
C
d)
D
8.
a)
A
b)
B
c)
C
d)
D
9.
a)
A
b)
B
c)
C
d)
D
10.
a)
A
b)
B
c)
C
d)
D
11.
a)
A
b)
B
c)
C
d)
D
12.
a)
A
b)
B
c)
C
d)
D
13.
a)
A
b)
B
c)
C
d)
D
14.
An angle whose measure is exactly 90 degrees.
a)
acute
b)
vertical
c)
right
d)
straight
15.
What is an "Acute" Angle?
a)
Angle that measures 180
b)
An Angle that measures 90
c)
An angle that measures more than 90
d)
An angle that measures less than 90
16.
Which angle type is pictured?
a)
Acute
b)
Right
c)
Obtuse
d)
Straight
17.
Which type of angle is pictured?
a)
Acute
b)
Right
c)
Obtuse
d)
Straight
18.
Which angle type is pictured?
a)
Acute
b)
Right
c)
Obtuse
d)
Straight
19.
Which type of triangle is pictured?
a)
Equilateral Triangle
b)
Right Isosceles Triangle
c)
Obtuse Scalene Triangle
d)
Obtuse Equilateral Triangle
20.
a)
Equilateral Triangle
b)
Scalene Triangle
c)
Isosceles Triangle
d)
Right Triangle
21.
Classify the triangle
a)
Obtuse Scalene
b)
Acute
c)
Right
d)
Isosceles
22.
Classify the triangle
a)
Equilateral
b)
Acute
c)
Obtuse Scalene
d)
Isosceles
23.
The sum of all angles in a triangle is always...
a)
180o
b)
360o
c)
90o
d)
60o
24.
Find the measure of the missing angle.
a)
135o
b)
35o
c)
45o
d)
30o
25.
a)
95
b)
85
c)
35
d)
45
26.
Find the value of x
a)
x = 79.5
b)
x = 74
c)
x = 159
d)
x = 21
27.
Classify by angle.
a)
Obtuse
b)
Right
c)
Acute
28.
Classify by angle
a)
Equilateral
b)
Right
c)
Acute
d)
Obtuse
29.
What kind of triangle is this?
a)
Acute
b)
Right
c)
Sparkly
d)
Obtuse
30.
How many right angles can a triangle have?
a)
1
b)
2
c)
3
d)
0
31.
An angle whose measure is exactly 90 degrees.
a)
acute
b)
vertical
c)
right
d)
straight
32.
What type of angle is shown?
a)
acute
b)
obtuse
c)
right
d)
straight
33.
Classify the triangle
a)
obtuse
b)
right
c)
acute
34.
Classify the triangle
a)
Obtuse
b)
Acute
c)
Right
35.
Classify by angle.
a)
Obtuse
b)
Right
c)
Acute
d)
Straight
36.
What type of triangle is this?
a)
Equilateral
b)
Isosceles
c)
Scalene
d)
Obtuse
37.
What type of triangle is this?
a)
scalene
b)
acute
c)
equilateral
d)
isosceles
38.
Classify the triangle
a)
Obtuse
b)
Equilateral
c)
Scalene
d)
Right
39.
The green triangle on this flag is a __________ triangle.
a)
Right triangle
b)
obtuse triangle
c)
acute triangle
d)
geometry triangle
40.
This birdhouse is what type of triangle?
a)
acute
b)
right
c)
obtuse
d)
perpindicular
41.
This clock is an obtuse triangle.
a)
true
b)
false
42.
An obtuse triangle has ____ angle(s) greater than 90 degrees and less than 180 degrees.
a)
0
b)
1
c)
2
d)
3
43.
The roof of this house is classified as a ________ triangle.
a)
acute
b)
right
c)
obtuse
d)
perpendicular
44.
All three angles of a triangle add up to _______ degrees.
a)
100
b)
180
c)
360
d)
90
45.
Both of these triangles are classified as ________?
a)
right
b)
obtuse
c)
scalene
d)
sailboats
46.
The 3 angles of a triangle are all 60 degrees. What type of triangle is this?
a)
obtuse
b)
right
c)
acute
d)
none of the above
47.
A triangle that has two sides and two angles that are the same length.
a)
Obtuse Triangle
b)
Isosceles Triangle
c)
Scalene Triangle
d)
Straight Triangle
48.
A triangle that has one angle that is larger than 90 degrees.
a)
Equilateral Triangle
b)
Right Triangle
c)
Acute Triangle
d)
Obtuse Triangle
49.
A triangle that has one 90 degree angle.
a)
Equilateral Triangle
b)
Right Triangle
c)
Obtuse Triangle
d)
Acute Triangle
50.
A triangle that has no sides that are the same length.
a)
Scalene Triangle
b)
Equilateral Triangle
c)
Isosceles Triangle
d)
Acute Triangle
51.
A triangle that has all angles measuring less than 90 degrees.
a)
Right Triangle
b)
Obtuse Triangle
c)
Scalene Triangle
d)
Acute Triangle
52.
A triangle that has all sides measuring the same length.
a)
Scalene Triangle
b)
Equilateral Triangle
c)
Isosceles Triangle
d)
Obtuse Triangle
53.
Find the missing angle.
a)
29°
b)
39°
c)
49°
d)
59°
54.
Find the measure of angle D.
a)
140 degrees
b)
16 degrees
c)
40 degrees
d)
90 degrees
55.
Solve for x.
a)
5
b)
12
c)
-7
d)
-6
56.
The Triangle Sum Theorem states that the sum of all angles in a triangle is ______.
a)
45°
b)
90°
c)
180°
d)
360°
57.
a)
146
b)
34
c)
36
d)
136
58.
a)
151
b)
147
c)
118
d)
62
59.
a)
122
b)
58
c)
115
d)
123
60.
a)
105
b)
150
c)
30
d)
151
61.
a)
140
b)
130
c)
50
d)
90
62.
a)
50
b)
160
c)
30
d)
150
63.
a)
135
b)
95
c)
45
d)
130
64.
a)
35 degrees
b)
45 degrees
c)
55 degrees
d)
65 degrees
65.
a)
48 degrees
b)
78 degrees
c)
104 degrees
d)
106 degrees
66.
a)
A
b)
B
c)
C
d)
D
67.
a)
A
b)
B
c)
C
d)
D
68.
a)
A
b)
B
c)
C
d)
D
69.
What is the measure of angle J?
a)
120 degrees
b)
180 degrees
c)
60 degrees
d)
70 degrees
70.
What is the measure of angle P?
a)
125 degrees
b)
55 degrees
c)
60 degrees
d)
180 degrees
71.
a)
A
b)
B
c)
C
d)
D
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