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Triangle/Angle Classification

Total questions: 50

Worksheet time: 13hrs 30mins

Name
Class
Date
1.

ACUTE means

a)

less than 90 degrees

b)

exactly 90 degrees

c)

greater than 90 degrees

2.

RIGHT means

a)

less than 90 degrees

b)

exactly 90 degrees

c)

greater than 90 degrees

3.

OBTUSE means

a)

less than 90 degrees

b)

exactly 90 degrees

c)

greater than 90 degrees

4.
What type of angle is shown?
a)
acute
b)
obtuse
c)
right
d)
straight
5.
What type of angle is shown?
a)
acute
b)
obtuse
c)
right 
d)
straight
6.
What type of angle is this? 
a)
acute
b)
obtuse
c)
right
d)
big
7.
Which angle type is pictured?
a)
Acute
b)
Right
c)
Obtuse
d)
Straight
8.
What type of angle is shown?
a)
acute
b)
obtuse
c)
right
d)
straight
9.

An ISOSCELES triangle has _____________.

a)

3 equal sides

b)

4 equal sides

c)

no equal sides

d)

2 equal sides

10.

An EQUILATERAL triangle has _____________.

a)

3 equal sides

b)

4 equal sides

c)

no equal sides

d)

2 equal sides

11.

A SCALENE triangle has _____________.

a)

3 equal sides

b)

4 equal sides

c)

no equal sides

d)

2 equal sides

12.
a)

equilateral

b)

isosceles

c)

scalene

13.
a)

equilateral

b)

isosceles

c)

scalene

14.
a)

equilateral

b)

isosceles

c)

scalene

15.

A triangle has side lengths of 15 centimeters, 11 centimeters, and 9 centimeters. What kind of triangle is it?

a)

equilateral

b)

isosceles

c)

scalene

16.

An ACUTE triangle has ________________.

a)

1 acute angle

b)

2 acute angles

c)

3 acute angles

d)

no acute angles

17.

A RIGHT triangle has ___________.

a)

1 right angle

b)

2 right angles

c)

3 right angles

d)

no right angles

18.

An OBTUSE triangle has _____________.

a)

1 obtuse angle

b)

2 obtuse angles

c)

3 obtuse angles

d)

no obtuse angles

19.
a)

acute

b)

obtuse

c)

right

20.
a)

acute

b)

obtuse

c)

right

21.
a)

acute

b)

obtuse

c)

right

22.
a)

acute

b)

obtuse

c)

right

23.
a)

acute

b)

obtuse

c)

right

24.
a)

equilateral

b)

isosceles

c)

scalene

25.

All of the angles in a triangle add up to be...

a)

90 degrees

b)

180 degrees

c)

less than 90 degrees

d)

greater than 90 degrees

26.
What is the sum of the angles inside a triangle?
a)
90
b)
180
c)
360
27.
Find the measure of the indicated angle. 
a)
26
b)
36
c)
85
d)
144
28.
Find the measure of angle D.
a)
140 degrees
b)
16 degrees
c)
40 degrees
d)
90 degrees
29.
What is the measure of the unlabeled angle of the triangle?
a)
90*
b)
82*
c)
98*
d)
75*
30.
Find the measure of the missing angle.
a)
90o
b)
100
c)
130o
d)
50o
31.
If two of the angles of a triangle are 30 and 70 degrees, the third angle measures...
a)
80
b)
100
c)
60
d)
90
32.
Find the value of x.
a)
18°
b)
28°
c)
38°
d)
118°
33.

How do you feel about angle and triangle classification now? (NO CORRECT ANSWER)

a)

Better than yesterday

b)

Alright

c)

It's still difficult

d)

Confident

34.
Find the measure of the missing angle.
a)
47
b)
57
c)
53
d)
133
35.
Find the measure of the missing angle.
a)
145
b)
55
c)
35
d)
45
36.
Find the measure of the missing angle.
a)
139°
b)
66°
c)
138°
d)
116°
37.
Find the measure of the missing angle.
a)
140°
b)
21°
c)
105°
d)
25°
38.
Find the measure of the missing angle.
a)
90o
b)
100
c)
130o
d)
50o
39.
What is the area?
a)
12 cm2
b)
14
c)
14 cm2
d)
24 cm2
40.
a)
108 cm
b)
540 cm
c)
108 cm2
d)
54 cm2
41.
Find the area of this triangle.
a)
150 ft2
b)
100 ft2
c)
50 ft2
d)
35 ft2
42.

Find the area of the triangle.

a)

20 cm2

b)

56 cm2

c)

28 cm2

d)

27 cm2

43.
Find the area:
a)
40 yd
b)
40 yd2
c)
80 yd2
d)
18 yd2
44.
a)

168 in

b)

84 in

c)

84 in284\ in^2

d)

168 in2168\ in^2

45.

What is the measurement of the base?

a)

b = 40 in

b)

b = 35 in

c)

b = 20 in

d)

b = 4 in

46.

Find the area of the triangle.

a)

30 m2

b)

60 m2

c)

16 m

d)

30 m

47.

Find the area of the triangle.

a)

11 cm2

b)

15 cm2

c)

30 cm2

48.

Find the area of the triangle.

a)

20 in

b)

40 cm2

c)

13 cm2

d)

20 cm2

49.

Find the area of the triangle.

a)

5 cm2

b)

10 cm2

c)

7 cm2

50.
What is the area of this triangle?
a)
12 sq. cm.
b)
6 sq. cm.
c)
12 cm
d)
6 cm

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