Triangles - Inequality Theorem & Angle Sum

1.

Multiple Choice

2 mins

1 pt

The sum of the interior angles in a triangle is ...

360 degrees

180 degrees

90 degrees

540 degrees

2.

Multiple Choice

2 mins

1 pt

If two angles in a triangle are $45\degree$ and $\ 75\degree$ , what is the measure of the third angle?

$75\degree$

$90\degree$

$60\degree$

$70\degree$

3.

Multiple Select

2 mins

1 pt

*Select all that apply*

Equilateral triangles ...

have three angles that are the same measure

have three side lengths that are the same measure

have only acute angles

have three angles that are each 60 degrees

4.

Multiple Select

2 mins

1 pt

Isosceles triangles ...

have three different side lengths

have two side lengths that are congruent

have two angles that are congruent

always have a 90 degree angle

5.

Multiple Choice

2 mins

1 pt

The word "congruent" means ...

obtuse

different

acute

equal

6.

Multiple Select

2 mins

1 pt

Scalene triangles ...

have three different angle mesures

have two side lengths that are congruent

have three different side lengths

always have one right angle

7.

Multiple Choice

2 mins

1 pt

$This\ symbol\ \cong means\ ...\$

acute

congruent

obtuse

right

8.

Multiple Select

2 mins

1 pt

Acute triangles have ...

have one obtuse angle

three angles that are acute

one right angle

have three angles that are less than 90 degrees

9.

Multiple Choice

2 mins

1 pt

A right triangle has ...

one right angle

three acute angles

two right angles

three obtuse angles

10.

Multiple Choice

2 mins

1 pt

How do you classify this triangle?

acute

obtuse

right

scalene

11.

Multiple Choice

2 mins

1 pt

What is the measure of angle a?

180

60

30

50

12.

Multiple Choice

2 mins

1 pt

What is the measure of the missing angle?

80

60

50

70

13.

Multiple Choice

2 mins

1 pt

The triangle inequality theorem states that the sum of any two sides must be ________________ the length of the third side.

less than

greater than

equal to

less than or equal to

14.

Multiple Choice

2 mins

1 pt

The triangle inequality theorem states that the _________ of any two sides must be greater than the length of the third side.

quotient

difference

sum

product

15.

Multiple Choice

2 mins

1 pt

Three line segments have measures of 12 cm, 7 cm, and 5 cm. Will the segments form a triangle?

Yes

No

16.

Multiple Choice

2 mins

1 pt

Three line segments have measures of 9 cm, 5 cm, and 6 cm. Will the segments form a triangle?

Yes

No

17.

Multiple Choice

2 mins

1 pt

A triangle has two angles that are 65 degrees and 50 degrees. What must the third angle be?

65

75

25

60

18.

Multiple Choice

2 mins

1 pt

The angles inside an equilateral triangle are all ...

20 degrees

50 degrees

60 degrees

45 degrees

19.

Multiple Choice

2 mins

1 pt

Is it possible to draw a triangle with the following angle measures: 80 degrees, 35 degrees, 55 degrees?

Yes

No

20.

Multiple Choice

2 mins

1 pt

Is it possible to draw a triangle with the following angle measures: 45 degrees, 120 degrees, and 15 degrees?

Yes

No

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