wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Math 8 Prefinal (PART 1)- TRIANGLE INEQUALITY

Total questions: 30

Worksheet time: 15mins

Name
Class
Date
1.

Which of the following statements is not true?

a)

∠d = ∠a+∠b

b)

m∠b < m∠d

c)

m∠a < m∠d

d)

∠d = ∠a+∠b

2.

Which shows the sides of ∆XYZ in order from longest to shortest?

a)

ZY, XZ, XY

b)

ZY, XY, XZ

c)

XY, XZ, ZY

d)

XY, YZ, ZX

3.

Carlos has 60 feet of fence to make a triangular garden. Which of the following sets of side lengths will NOT work?

a)

20 feet, 20 feet, 20 feet

b)

15 feet, 20 feet, 25 feet

c)

10 feet, 25 feet, 25 Feet

d)

10 feet, 15 feet, 35 feet

4.

Angle 4 is an exterior angle of ∆PQR. Which statement is true?

a)

m∠3 > m∠4

b)

m∠4 > m∠2

c)

m∠4 < m∠2

d)

m∠1 < m∠4

5.

Find the possible values of x.

a)

9 < x < 15

b)

6 < x < 9

c)

3 < x < 16

d)

3< x< 15

6.

A triangular playground has two sides measuring 50 feet and 85 feet. What are the possible measures of the third side of the triangle?

a)

0 feet and 134 feet

b)

36 feet and 134 feet

c)

35 feet and 135 feet

d)

0 feet and 135 feet

7.

In the figure below m∠P < m∠X. What conclusion can you make using the Hinge Theorem?

a)

PR = XZ

b)

PQ = XY

c)

QR> YZ

d)

QR< YZ

8.

In ∆ABC and ∆XYZ, AB = XY, BC =YZ, and m∠B> m∠Y. What statement describes the relationship between AC and XZ?

a)

AC≤ XZ

b)

AC< XZ

c)

AC> XZ

d)

AC = XZ

9.

Which inequality describes the possible values of x?

a)

x> 120

b)

x < 120

c)

x> 30

d)

x<30

10.

Which statement can be proven using the converse of the Hinge Theorem?

a)

m∠ EAB < m∠CBD

b)

m∠ EAB > m∠CBD

c)

EB > CD

d)

EB < CD

11.

Which of the following statement is true.

a)

JL = KL

b)

KL = KM

c)

JL< KM

d)

JL > KM

12.

Which of the following statement is true if m∠QRW < m∠XRW?

a)

WX = RW

b)

QW = RW

c)

WX < QW

d)

WX>QW

13.

Maria has 80 feet of fence to make a triangular garden. Which of the following sets of side lengths will NOT work?

a)

20 feet, 28 feet, 30 feet

b)

20 feet, 20 feet, 25 feet

c)

18 feet, 26 feet, 36 feet

d)

12 feet, 16 feet, 36 feet

14.

Angle 2 and 3 are interior angles of ∆PQR. Which statement is true?

a)

m∠3 < m∠4

b)

m∠4 > m∠1

c)

m∠3 < m∠2

d)

m∠1 < m∠4

15.

What is the value of x?

a)

88

b)

78

c)

68

d)

66

16.

A triangular garden has two sides measuring 15 feet and 25 feet. What are the possible measures of the third side of the triangle?

a)

11feet to 40 feet

b)

10 feet to 40 feet

c)

11 feet to 39 feet

d)

0 feet to 10 feet

17.

In the figure below m∠P < m∠X. What conclusion can you make using the Hinge Theorem?

a)

PR = XZ

b)

PQ = XY

c)

QR> YZ

d)

YZ > QR

18.

In ∆MNY and ∆QRS, MN=QR, NY=RS, and m∠N>m∠R. What statement describes the relationship between AC and XZ?

a)

MY≤ QS

b)

MY< QS

c)

MY> QS

d)

MY = QS

19.

Find the range of possible measures for the third side.

a)

10 < x < 12

b)

4 < x < 12

c)

8 < x < 10

d)

4 < x < 8

20.

Find the value of x

a)

122°122\degree

b)

120°120\degree

c)

111°111\degree

d)

102°102\degree

21.

The triangle inequality theorem states the sum of the lengths of any two sides of a

triangle is ______________ the length of the third side.

a)

less than or equal to

b)

greater than or equal to

c)

less than

d)

greater than

22.

Name the smallest angle in this triangle.

a)

None of these

b)

∠V

c)

∠O

d)

∠L

23.

Does this triangle with these side lengths exist? 12, 9, 6

a)

Maybe

b)

I don’t know

c)

No

d)

Yes

24.

In ∆CAT and ∆DOG shown below, which of the following statement is true?

a)

DG is longer than CA

b)

CA is longer than DO

c)

DG is shorter than CT

d)

CT is longer than DG

25.

Two sides of a triangle have side length of 15 meters and 10 meters. What is the range of possible lengths of the third side?

a)

6 > x > 12

b)

5 < x < 26

c)

10 > x >15

d)

7 > x > 5

26.

Cathy has a pet rabbit and wants to build a pen for it. She has 3 pieces of lumber: one is 4 m, one is 8 m, and the other is 9 m long. Can she build a closed triangular pen with these three boards

a)

yes

b)

no

c)

maybe

d)

sometimes

27.

Which of the following could be the length of AB\overline{AB} ?

a)

1

b)

2

c)

5

d)

3

28.

In ∆TOP , TO\overline{TO} =8, TP\overline{TP} =10, and OP\overline{OP} = 6. Name the smallest and largest angle.

a)

smallest ∠O, largest ∠T

b)

smallest ∠T, largest ∠O

c)

smallest ∠O, largest ∠P

d)

none of these

29.

Steven has proved that LO\overline{LO} > EO\overline{EO} . Which of the following statement is not part of his

proof?

a)

OV\overline{OV}OV\overline{OV}

b)

∠L < ∠E

c)

∠LOV + ∠OVE = 180

d)

LV\overline{LV}VE\overline{VE}

30.

If side A is congruent to side D, and side C is congruent to side F, then angle X is greater than Y, then

a)

That is not possible

b)

Side B is twice larger than side E

c)

Side E is greater than side B

d)

Side B is greater than side E