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CLASSIFY TRIANGLES

Total questions: 25

Worksheet time: 6hrs 15mins

Name
Class
Date
1.
a)

acute

b)

obtuse

c)

right

2.
Name this triangle
a)
Acute, Scalene
b)
Obtuse, Scalene
c)
Right, Isosceles
d)
Acute, Equilateral
3.
Which type of triangle is pictured?
a)
Equilateral Triangle
b)
Right Isosceles Triangle
c)
Obtuse Scalene Triangle
d)
Obtuse Equilateral Triangle
4.
Find the measure of the indicated angle. 
a)
26
b)
36
c)
85
d)
144
5.
Classify this triangle by its angles.
a)
right
b)
equiangular
c)
acute
d)
obtuse
6.
Classify this triangle by its sides and angles
a)
right isosceles
b)
acute scalene
c)
obtuse scalene
d)
acute isosceles
7.
Classify this triangle by its sides and angles
a)
right isosceles
b)
obtuse scalene
c)
equilateral equiangular
d)
obtuse isosceles
8.
a)

equilateral

b)

isosceles

c)

scalene

9.
a)

equilateral

b)

isosceles

c)

scalene

10.

A triangle that has 3 acute (less than 90 degrees) angles.

a)

acute triangle

b)

right triangle

c)

obtuse triangle

11.

A triangle that has one obtuse (greater than 90 degrees) angle.

a)

acute triangle

b)

right triangle

c)

obtuse triangle

12.

A triangle that has on right (90 degree) angle.

a)

acute triangle

b)

obtuse triangle

c)

right triangle

13.

A triangle that has no sides with the same length.

a)

equilateral triangle

b)

scalene triangle

c)

isosceles triangle

14.

A triangle that has three sides with the same length.

a)

equilateral triangle

b)

isosceles triangle

c)

scalene triangle

15.

A triangle that has at least two sides with the same length.

a)

equilateral triangle

b)

isosceles triangle

c)

scalene triangle

16.
Find the measure of each angle indicated. 
a)
33°
b)
136°
c)
36°
d)
31°
17.
Find the measure of each angle indicated. 
a)
139°
b)
66°
c)
138°
d)
116°
18.
Find the measure of each angle indicated. 
a)
140°
b)
21°
c)
105°
d)
25°
19.
Find the measure of each angle indicated. 
a)
40°
b)
33°
c)
30°
d)
29°
20.
What is the third angle of a triangle whose 1st angle is 34 and 2nd angle is 101?
a)
32
b)
39
c)
45
d)
54
21.
Find the measure of each angle indicated. 
a)
139°
b)
66°
c)
138°
d)
116°
22.
Find the measure of the missing angle.
a)
30o
b)
110o
c)
150o
d)
40o
23.

A triangle has one angle that measure 45° and one that measures 60°. What is the measure of the third angle?

a)

135°

b)

75°

c)

120°

d)

105°

24.

Two interior angles of a triangle measure 56 °\degree  and 37 °\degree  . What is the third interior angle of the triangle? 

a)

267 degrees

b)

145 degrees

c)

93 degrees

d)

87 degrees

25.

Two interior angles of a triangle measure 34 degrees and 38 degrees. What is the third interior angle of the triangle?

a)

108 degrees

b)

72 degrees

c)

2 degrees

d)

23 degrees