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Identify and Name Triangles by Side Lengths and Angle Measures

Total questions: 70

Worksheet time: 1hrs 8mins

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.
An angle whose measure is exactly 90 degrees.
a)
acute
b)
vertical
c)
right
d)
straight
14.
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
15.
Which angle type is pictured?
a)
Acute
b)
Right
c)
Obtuse
d)
Straight
16.
Which type of angle is pictured?
a)
Acute
b)
Right
c)
Obtuse
d)
Straight
17.
Which angle type is pictured?
a)
Acute
b)
Right
c)
Obtuse
d)
Straight
18.
a)
Equilateral Triangle
b)
Scalene Triangle
c)
Isosceles Triangle
d)
Right Triangle
19.
Classify the triangle
a)
Equilateral
b)
Acute
c)
Obtuse Scalene
d)
Isosceles
20.
The sum of all angles in a triangle is always...
a)
180o
b)
360o
c)
90o
d)
60o
21.
Classify by angle.
a)
Obtuse
b)
Right
c)
Acute
22.
Classify by angle
a)
Equilateral
b)
Right
c)
Acute
d)
Obtuse
23.
What kind of triangle is this?
a)
Acute
b)
Right
c)
Sparkly
d)
Obtuse
24.
How many right angles can a triangle have?
a)
1
b)
2
c)
3
d)
0
25.
An angle whose measure is exactly 90 degrees.
a)
acute
b)
vertical
c)
right
d)
straight
26.
Classify the triangle
a)
obtuse
b)
right
c)
acute
27.
Classify the triangle
a)
Obtuse 
b)
Acute
c)
Right
28.
Classify by angle.
a)
Obtuse
b)
Right
c)
Acute
d)
Straight
29.
What type of triangle is this?
a)
Equilateral
b)
Isosceles
c)
Scalene
d)
Obtuse
30.
What type of triangle is this?
a)
scalene
b)
acute
c)
equilateral
d)
isosceles
31.
Classify the triangle
a)
Obtuse
b)
Equilateral
c)
Scalene
d)
Right
32.
The green triangle on this flag is a __________ triangle.
a)
Right triangle
b)
obtuse triangle
c)
acute triangle
d)
geometry triangle
33.
This birdhouse is what type of triangle?
a)
acute
b)
right
c)
obtuse
d)
perpindicular
34.
This clock is an obtuse triangle.
a)
true
b)
false
35.
An obtuse triangle has ____ angle(s) greater than 90 degrees and less than 180 degrees.
a)
0
b)
1
c)
2
d)
3
36.
The roof of this house is classified as a ________ triangle.
a)
acute
b)
right
c)
obtuse
d)
perpendicular
37.
All three angles of a triangle add up to _______ degrees.
a)
100
b)
180
c)
360
d)
90
38.
Both of these triangles are classified as ________?
a)
right
b)
obtuse
c)
scalene
d)
sailboats
39.
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
40.
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
41.
A triangle that has one angle that is larger than 90 degrees.
a)
Equilateral Triangle
b)
Right Triangle
c)
Acute Triangle
d)
Obtuse Triangle
42.
A triangle that has one 90 degree angle.
a)
Equilateral Triangle
b)
Right Triangle
c)
Obtuse Triangle
d)
Acute Triangle
43.
A triangle that has no sides that are the same length.
a)
Scalene Triangle
b)
Equilateral Triangle
c)
Isosceles Triangle
d)
Acute Triangle
44.
A triangle that has all angles measuring less than 90 degrees.
a)
Right Triangle
b)
Obtuse Triangle
c)
Scalene Triangle
d)
Acute Triangle
45.
A triangle that has all sides measuring the same length.
a)
Scalene Triangle
b)
Equilateral Triangle
c)
Isosceles Triangle
d)
Obtuse Triangle
46.
The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 
a)
45°
b)
90°
c)
180°
d)
360°
47.
a)

35 degrees

b)

45 degrees

c)

55 degrees

d)

65 degrees

48.

Three angles of a triangle are 62 degrees, 48 degrees, and 70 degrees. What type of triangle is it?

a)

acute

b)

obtuse

c)

right

d)

none of these

49.

Three angles of a triangle are 100 degrees, 10 degrees, and 70 degrees. What type of triangle is it?

a)

acute

b)

obtuse

c)

right

d)

none of these

50.

Three angles of a triangle are 90 degrees, 45 degrees, and 45 degrees. What type of triangle is it?

a)

acute

b)

obtuse

c)

right

d)

none of these

51.

Three angles of a triangle are 30 degrees, 70 degrees, and 80 degrees. What type of triangle is it?

a)

acute

b)

right

c)

obtuse

d)

none of these

52.

Three angles of a triangle are 55 degrees, 45 degrees, and 80 degrees. What type of triangle is it?

a)

acute

b)

right

c)

obtuse

d)

none of these

53.

Three angles of a triangle are 120 degrees, 40 degrees, and 20 degrees. What type of triangle is it?

a)

acute

b)

right

c)

obtuse

d)

none of these

54.

Three angles of a triangle are 90 degrees, 30 degrees, and 60 degrees. What type of triangle is it?

a)

right

b)

acute

c)

obtuse

d)

none of these

55.

Three angles of a triangle are 90 degrees, 50 degrees, and 40 degrees. What type of triangle is it?

a)

acute

b)

right

c)

obtuse

d)

none of these

56.

The three sides of a triangle measure 48 m, 48 m, and 48 m. What type of triangle is it?

a)

isosceles

b)

scalene

c)

equilateral

d)

none of these

57.

The three sides of a triangle measure 58 m, 58 m, and 58 m. What type of triangle is it?

a)

isosceles

b)

scalene

c)

equilateral

d)

none of these

58.

The three sides of a triangle measure 78 m, 78 m, and 28 m. What type of triangle is it?

a)

equilateral

b)

scalene

c)

isosceles

d)

none of these

59.

The three sides of a triangle measure 48 m, 48 m, and 95 m. What type of triangle is it?

a)

equilateral

b)

scalene

c)

isosceles

d)

none of these

60.

The three sides of a triangle measure 58 m, 88 m, and 38 m. What type of triangle is it?

a)

scalene

b)

isosceles

c)

equilateral

d)

none of these

61.

The three sides of a triangle measure 40 m, 70 m, and 34 m. What type of triangle is it?

a)

scalene

b)

isosceles

c)

equilateral

d)

none of these

62.

The three sides of a triangle measure 50 m, 20 m, and 60 m. What type of triangle is it?

a)

scalene

b)

isosceles

c)

equilateral

d)

none of these

63.

The three sides of a triangle measure 83 m, 42 m, and 45 m. What type of triangle is it?

a)

scalene

b)

isosceles

c)

equilateral

d)

none of these

64.

The three sides of a triangle measure 83 m, 22 m, and 65 m. What type of triangle is it?

a)

equilateral

b)

isosceles

c)

scalene

d)

none of these

65.

The three angles of a triangle measure 86 degrees, 44 degrees, and 50 degrees. What type of triangle is it?

a)

right

b)

acute

c)

obtuse

d)

none of these

66.

The three angles of a triangle measure 127 degrees, 43 degrees, and 10 degrees. What type of triangle is it?

a)

right

b)

acute

c)

obtuse

d)

none of these

67.

The three angles of a triangle measure 60 degrees, 90 degrees, and 30 degrees. What type of triangle is it?

a)

acute

b)

right

c)

obtuse

d)

none of these

68.

The three angles of a triangle measure 46 degrees, 44 degrees, and 90 degrees. What type of triangle is it?

a)

right

b)

acute

c)

obtuse

d)

none of these

69.

The three angles of a triangle measure 56 degrees, 44 degrees, and 80 degrees. What type of triangle is it?

a)

acute

b)

right

c)

obtuse

d)

none of these

70.

The three angles of a triangle measure 56 degrees, 102 degrees, and 22 degrees. What type of triangle is it?

a)

acute

b)

obtuse

c)

right

d)

none of these

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