Free Printable Unit 5: Triangles

1.

Find the measure of the indicated angle.

a)

$135\degree$

b)

$55\degree$

c)

$45\degree$

d)

$60\degree$

2.

Find the measure of the indicated angle.

a)

$30\degree$

b)

$25\degree$

c)

$155\degree$

d)

$65\degree$

3.

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______.

a)

45°

b)

90°

c)

180°

d)

360°

4.

The angles inside an equilateral triangle are all ...

a)

20 degrees

b)

50 degrees

c)

60 degrees

d)

45 degrees

5.

A student is trying to construct triangles using four different sets of angles. The angles in each set are given below. Which set will form a triangle?

a)

45°, 65°, 70°

b)

150°, 110°, 100°

c)

50°, 50°, 50°

d)

90°, 90°, 90°

6.

Solve for x.

a)

6

b)

5

c)

-11

d)

4

7.

Solve for the missing angle with the question mark.

a)

A

b)

B

c)

C

d)

D

8.

Which of the following terms best describes Angle d?

a)

Remote interior angle

b)

Corresponding angle

c)

Exterior angle

d)

Interior angle

9.

What is the value of the missing angle?

a)

90

b)

100

c)

20

d)

120

10.

What is the value of the missing angle?

a)

105

b)

80

c)

55

d)

25

11.

What is the LONGEST side in this figure? Be careful...this is tricky!

a)

AB

b)

BC

c)

CD

d)

DA

e)

DB

12.

If the measures of 2 sides of a triangle are 57 and 32, what is the LEAST possible measure of the third side if the measure is an integer?

a)

25

b)

26

c)

88

d)

89

13.

Which of the following could NOT be the third side of a triangle with sides 35 and 14? Check all that apply.

a)

21

b)

48

c)

26

d)

35

e)

14

14.

Which of the following could be the third side of a triangle with sides 5.2 and 7.2? Check all that apply.

a)

21

b)

2

c)

9

d)

12.4

e)

11

15.

Name a possible length for the third side of a triangle with sides 11 and 19.

4 lines

16.

Name a possible length for the third side of a triangle with sides 4 and 7.

4 lines

17.

Can these sides form a triangle? 6, 4, 4

a)

Yes

b)

No

18.

Can these sides form a triangle?

6\ \frac{1}{4},\ 14\ \frac{1}{2},\ 6\ \frac{1}{2}

a)

Yes

b)

No

19.

Can these sides form a triangle? 2, 9, 5

a)

Yes

b)

No

20.

List the sides of triangle ABC in ASCENDING order if <A=36 degrees and <B=81 degrees.

a)

AB, BC, CA

b)

BC, AB, AC

c)

BC, AC, BA

21.

If the longest side of the triangle was 10. Then the two shorter sides must have a sum that is ....?

a)

any length

b)

equal to 10

c)

greater than 10

d)

less than 10

Unit 5: Triangles

Total questions: 21

Worksheet time: 42mins

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