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Number and Operations in Base Ten
X_STANDARDS_NA, X_STANDARDS_NA
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he M
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w-H
ill Co
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, Inc
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Lesson 3
Hands On: Triangles
Practice
Measure the sides of each triangle below to the nearest quarter of an inch. Then state the number of sides with equal lengths.
1.
in.in.
34
34
in.1
2.
in.in.
1411
2
in.1
sides sides
Homework Helper
Measure the sides of each triangle below to the nearest quarter of an inch. Then state the number of sides with equal lengths.
in.
in.
in.12
12
12 in.
in.in.
34
12
12
The triangle has 3 sides with equal lengths.
The triangle has 2 sides with equal lengths.
Compare the angles of each triangle. Then describe the triangle using its angles.
The triangle has 1 angle that is greater than a right angle.
The triangle is a right triangle.
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Lesson 3 My Homework�849
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Geometry
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, Inc
. Ra
dlun
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Vocabulary Check
8. A triangle with one right angle is called a triangle.
Fill in the missing word.
Problem Solving
5. 6 Be Precise In billiards, a rack is used to organize billiard balls at the beginning of the game. Measure the sides of the triangle shown. What is the length of each side to the nearest quarter inch?
6. Refer to Exercise 5. How many angles are less than a right angle?
7. How many angles are less than a right angle in the triangle shown at the right?
Compare the angles of each triangle. Then circle the correct description.
3.
3 angles are less than a right angle
1 right angle.
4.
3 angles greater than a right angle
1 angle is greater than a right angle
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1 1 _ 2 inches
3 angles
2 angles
850�Chapter 14 Geometry
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Vocab
Rack them up!
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