WorksheetsTriangle Properties
Total questions: 63
Worksheet time: 4hrs 42mins
Name
Class
Date
1.
Find the measure of the angle indicated.
a)
139°
b)
66°
c)
138°
d)
116°
2.
If all three angles are exactly the same measure, how big is each angle?
Hint: x + x + x = 180
Hint: x + x + x = 180
a)
180 degrees
b)
90 degrees
c)
50 degrees
d)
60 degrees
3.
Find the measure of angle A.
a)
75o
b)
60o
c)
30o
d)
38o
4.
Angles that are exactly 90 degrees are called _____ ______.
a)
tight angles
b)
acute angles
c)
obtuse angles
d)
right angles
5.
In a triangle, how many total degrees are there?
a)
100%
b)
180 degrees
c)
it varies
d)
360 degrees
6.
Find the measure of the missing angle.
a)
90o
b)
100
c)
130o
d)
50o
7.
Classify by side.
a)
Isosceles
b)
Scalene
c)
Equilateral
8.
Classify by angle
a)
Equilateral
b)
Right
c)
Acute
d)
Obtuse
9.
Classify by side length
a)
Acute
b)
Isosceles
c)
Right
d)
Equilateral
10.
Which type of triangle is pictured?
a)
Equilateral Triangle
b)
Right Isosceles Triangle
c)
Obtuse Scalene Triangle
d)
Obtuse Equilateral Triangle
11.
Find the missing angle.
a)
151
b)
147
c)
118
d)
62
12.
What type of triangle is this?
a)
scalene
b)
acute
c)
equilateral
d)
isosceles
13.
Which would be the best classification for the triangle shown?
a)
acute isosceles
b)
right scalene
c)
acute scalene
d)
obtuse scalene
14.
Which would be the best classification for the triangle shown?
a)
acute isosceles
b)
obtuse scalene
c)
obtuse isosceles
d)
acute scalene
15.
Which would be the best classification for the triangle shown?
a)
right isosceles
b)
obtuse scalene
c)
obtuse isosceles
d)
right scalene
16.
What is the value of the missing angle?
a)
61
b)
50
c)
60
d)
69
17.
What is the value of x?
a)
60
b)
5
c)
10
d)
-3
18.
What is the value of x?
a)
51
b)
49
c)
78
19.
What is the measure of angle 2?
a)
50
b)
65
c)
115
20.
Classify by angle.
a)
Obtuse
b)
Right
c)
Acute
21.
Name this triangle
a)
Acute, Scalene
b)
Obtuse, Scalene
c)
Right, Isosceles
d)
Acute, Equilateral
22.
Find the measure of the missing angle.
a)
90o
b)
100
c)
130o
d)
50o
23.
Find the measure of each angle indicated.
a)
139°
b)
66°
c)
138°
d)
116°
24.
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
25.
The Triangle Sum Theorem states that the sum of all angles in a triangle is ______.
a)
45°
b)
90°
c)
180°
d)
360°
26.
Find the measure of the angle indicated.
a)
139°
b)
66°
c)
138°
d)
116°
27.
Angles that are exactly 90 degrees are called _____ ______.
a)
tight angles
b)
acute angles
c)
obtuse angles
d)
right angles
28.
What is the value of the missing angle?
a)
61
b)
50
c)
60
d)
69
29.
A triangle has angle measurements of 54°, 52°, and 74°. What kind of triangle is it?
a)
acute triangle
b)
right triangle
c)
obtuse triangle
d)
none of the above
30.
The Triangle Sum Theorem states that the if you add all angles in a triangle you will get the magic number ______.
a)
45°
b)
90°
c)
180°
d)
360°
31.
Does a triangle with these side lengths exist?
15, 12, 9
15, 12, 9
a)
Yes, only one
b)
No
c)
Yes, many
32.
Does a triangle with these side lengths exist?
20, 10, 9
20, 10, 9
a)
Yes, only one
b)
No
c)
Yes, many
33.
Does a triangle with these side lengths exist?
4, 6, 7
4, 6, 7
a)
Yes, only one
b)
No
c)
Yes, many triangles
34.
Do the following side lengths form a triangle?
2 inches, 2 inches, 4 inches
2 inches, 2 inches, 4 inches
a)
Yes
b)
No
35.
9. Which of these lengths CANNOT represent the sides of a triangle?
a)
32, 34, 60
b)
28, 30, 58
c)
13, 20, 27
d)
2, 4, 5
36.
Find the measure of each angle indicated.
a)
50°
b)
35°
c)
100°
d)
55°
37.
Which of the following does not represent the lengths of the sides of a triangle?
a)
2 cm, 6 cm, 7 cm
b)
5 cm, 2 cm, 5 cm
c)
5 cm, 5 cm, 8 cm
d)
3 cm, 10 cm, 15 cm
38.
Select the measurements that match the sides of a triangle.
a)
7, 9, 19
b)
7, 12, 1
c)
7, 7, 7
d)
7, 7, 16
39.
The measures of complementary angles add up to how many degrees in total?
a)
180
b)
90
c)
100
d)
360
40.
Find the unknown angle measure x.
a)
75 degrees
b)
15 degrees
c)
13 degrees
d)
105 degrees
41.
Find the unknown angle measure x.
a)
28 degrees
b)
31 degrees
c)
62 degrees
d)
118 degrees
42.
An angle measures 14 degrees. What's the measure of this angle's complement?
a)
166 degrees
b)
14 degrees
c)
76 degrees
d)
86 degrees
43.
An angle measures 57 degrees. What's the measure of its complementary angle?
a)
23 degrees
b)
43 degrees
c)
123 degrees
d)
33 degrees
44.
Find the missing angle.
a)
60
b)
70
c)
50
d)
140
45.
Find the missing angle.
a)
41
b)
32
c)
51
d)
31
46.
What is the measure of the missing angle?
a)
39
b)
129
c)
119
d)
129
47.
What is an "Acute" Angle
a)
Angle that measures 180
b)
An Angle that measure 90
c)
An angle that measures more than 90
d)
An angle that measures less than 90
48.
Angles whose measure sum up to 180 degrees.
a)
Vertical
b)
Adjacent
c)
Complementary
d)
Supplementary
49.
An angle whose measure is exactly 90 degrees.
a)
acute
b)
vertical
c)
right
d)
straight
50.
How many degrees is a straight angle?
a)
90
b)
360
c)
180
d)
145
51.
What type of angle is this?
a)
acute
b)
obtuse
c)
right
52.
Find the value of x.
a)
15
b)
30
c)
45
d)
60
53.
Tell whether the angles are complementary or supplementary. Then find the value of x.
a)
Complementary; x=25
b)
Complementary; x=5
c)
Supplementary; x=25
d)
Supplementary; x=5
54.
Two angles are complementary if the sum of their angles is 180o
a)
True
b)
False
55.
Two angles are suppplementary if the sum of their angles is 180o
a)
True
b)
False
56.
complementary, supplementary, or neither?
a)
Complementary
b)
Supplementary
c)
Neither
57.
complementary, supplementary, or neither?
a)
Complementary
b)
Supplementary
c)
Neither
58.
complementary, supplementary, or neither?
a)
Complementary
b)
Supplementary
c)
Neither
59.
Find the complement of the angle
a)
32
b)
58
c)
148
d)
122
60.
Find the complement of the angle
a)
13
b)
103
c)
77
d)
167
61.
Find the supplement of the angle
a)
160
b)
20
c)
-70
d)
180
62.
Find the supplement of the angle
a)
90
b)
0
c)
45
d)
180
63.
Find the supplement of the angle
a)
108
b)
18
c)
72
d)
162
100 %
