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8-4

Name

Date

Simplify each fraction.

1.

3

_________ 9 ÷

=

3__

2. _________ 18 ÷

12 ÷ 4

30 ÷

3

6

6

=

3__

5

3. _________ 25 ÷ 25

75 ÷

25

= 4. _________ 32 ÷ 8

1__

3

72 ÷

8

=

4__

9

The measure of each shaded angle is given.

Write the measure of each angle that is not shaded.

5. 6.

200˚

125˚

160˚

235˚

7. Stretch Your Thinking Aileen is trying to correctly

classify a triangle by its angles. Her only information

is that the triangle has at least one acute angle.

Aileen says this must be an acute triangle. Is she right?

Explain.

Possible explanation: it could be an acute triangle.

It also could be a right triangle or an obtuse triangle.

She does not have enough information. All triangles

have at least two acute angles. An acute triangle

has three acute angles. A right triangle has one

right angle and two acute angles. An obtuse triangle

has one obtuse angle and two acute angles.

© Houghton Mifflin Harcourt Publishing Company

182 UNIT 8 LESSON 4 Name Triangles

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