Pre-Algebra Chapter 9

Vocabulary and Concepts
1. OPEN ENDED Give an example of a whole number, a natural number, an
irrational number, a rational number, and an integer.
2. Explain how to classify a triangle by its angles and by its sides.
Skills and Applications
Find each square root, if possible.
3. 81 4. 121
5. 49
6. Without using a calculator, estimate 42 to the nearest integer.
ALGEBRA
Solve each equation. Round to the nearest tenth, if necessary.
7. x 2 100 8. w 2 38
9. Use a protractor to measure CAB. Then classify the angle as acute,
obtuse, right, or straight.
For Exercises 10 and 11, use the following information.
In MNP, mN 87° and mP 32°.
10. Find the measure of M.
11. Classify MNP by its angles and by its sides.
If c is the measure of the hypotenuse, find each missing measure. Round to
the nearest tenth, if necessary.
12. a 6, b 8, c ? 13. a 15, b ?, c 32
14. HIKING Brandon hikes 7 miles south and 4 miles west. How far
is he from the starting point of his hike? Round to the nearest tenth.
15. Find the distance between A(3, 8) and B(5, 2). Then find the coordinates of the
midpoint of AB.
16. PARKS In the map of the park, the triangles are
similar. Find the distance to the nearest tenth
from the playground to the swimming pool.
45 ft
36 ft
50 ft
A
C
Swimming Pool
B
Playground
x ft
Find each sine, cosine, or tangent. Round to four
decimal places, if necessary.
17. sin P 18. tan M 19. cos P
P
5
N
12
13
M
20. STANDARDIZED TEST PRACTICE Which statement is true?
A 4 10 3 B 6 28 5
C 7 59 8 D 7 47 6
www.pre-alg.com/chapter_test
Chapter 9 Practice Test 487