All About Triangles - Assessment

1.

Multiple Choice

30 sec

1 pt

The triangles shown are similar. Which side corresponds with side BC?

AB

DE

EF

CA

2.

Multiple Choice

30 sec

1 pt

The triangles shown are similar. Which angle corresponds to angle D?

$\angle$ A

$\angle$ B

$\angle$ C

$\angle$ E

3.

Multiple Choice

30 sec

1 pt

The triangles shown are similar. What is the scale factor from ABC to DEF?

2

3

4

5

4.

Multiple Choice

30 sec

1 pt

The triangles shown are similar. Find the length of side EF.

3

12

15

18

5.

Multiple Choice

30 sec

1 pt

All the angles in a triangle

add up to ....

90 degrees

180 degrees

360 degrees

It depends on the triangle

6.

Multiple Choice

2 mins

1 pt

Find the missing angle in the triangle.

$81^o$

$91^o$

$99^o$

$101^o$

7.

Multiple Choice

30 sec

1 pt

Can angles measuring 78^o, 30^o, and 82^o make a triangle?

Yes

No

8.

Multiple Choice

1 min

1 pt

If two side lengths of a triangle are 30 cm and 50 cm, what is a possible length of the third side?

70 cm

80 cm

100 cm

9.

Multiple Choice

2 mins

1 pt

Find the measure of angle x.

125^o

45^o

60^o

35^o

10.

Multiple Choice

30 sec

1 pt

A triangle with all 3 angles measuring less than 90^o is called a(n) ...

Acute Triangle

Right Triangle

Obtuse Triangle

11.

Multiple Choice

30 sec

1 pt

Can the side lengths of 3 ft, 7 ft, and 9 ft create a triangle? Explain.

No, the shape won't close.

Yes, the two shorter sides add up to be larger than the third side.

There is not enough information.

12.

Multiple Choice

30 sec

1 pt

A triangle with two congruent sides

is called a(n) ...

Isosceles Triangle

Scalene Triangle

Equilateral Triangle

None of the Above

13.

Multiple Choice

30 sec

1 pt

A triangle with no congruent sides

is called a(n) ...

Isosceles Triangle

Scalene Triangle

Equilateral Triangle

None of the Above

14.

Multiple Choice

30 sec

1 pt

A triangle with one angle

greater than 90^o is called a(n) ...

Acute Triangle

Right Triangle

Obtuse Triangle

15.

Multiple Choice

30 sec

1 pt

The triangles are similar. Angle B is 40^o.

What is the measure of angle E?

130^o

50^o

40^o

None of the Above

16.

Multiple Select

45 sec

1 pt

Select ALL the true facts

about triangles.

Their angle measures add up to 180^o.

Corresponding angles in similar triangles change with a scale factor.

The sum of the two shortest sides in a triangle must be larger than the third side.

Triangles are not polygons.

17.

Multiple Choice

30 sec

1 pt

Triangle ABC and triangle FDE are ...

Similar

Congruent

Different Sizes

Right Triangles

18.

Multiple Choice

2 mins

1 pt

Find the area of the triangle. Remember:

A=\frac{1}{2}\times b\times h

10 $cm^2$

13 $cm^2$

20 $cm^2$

40 $cm^2$

19.

Multiple Choice

2 mins

1 pt

Find the area of the triangle. Remember:

A=\frac{1}{2}\times b\times h

54 $cm^2$

108 $cm^2$

27 $cm^2$

12 $cm^2$

20.

Multiple Choice

5 mins

5 pts

**CHALLENGE**

Find the missing angles.

x=50^o, y=63^o, z=32^o

x=50^o, y=63^o, z=63^o

x=67^o, y=63^o, z=42^o

x=67^o, y=63^o, z=32^o

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