Page 650 - Basic College Mathematics with Early Integers

Vocabulary and Readiness Check

Use the choices below to fill in each blank.

acute straight degrees adjacent parallel intersecting
obtuse space plane point vertical vertex

right angle ray line perpendicular transversal
1. A(n) is a flat surface that extends indefinitely.
2. A(n) has no length, no width, and no height.
3. extends in all directions indefinitely.
4. A(n) is a set of points extending indefinitely in two directions.
5. A(n) is part of a line with one endpoint.
6. A(n) is made up of two rays that share a common endpoint.The common endpoint is called the
.
7. A(n) angle measures 180°.
8. A(n) angle measures 90°.
9. A(n) angle measures between 0° and 90°.
10. A(n) angle measures between 90° and 180°.
11. lines never meet and lines meet at a point.
12. Two intersecting lines are if they form right angles when they intersect.
13. An angle can be measured in .
14. A line that intersects two or more lines at different points is called a(n) .
15. When two lines intersect, four angles are formed, called angles.
16. Two angles that share a common side are called angles.

9.1 Exercise Set FOR EXTRA HELP

Objective Identify each figure as a line, a ray, a line segment, or an angle.Then name the figure using the given points.
See Examples 1 and 2.
1. l 2. G 3. M 4.
T
D
N S
H
I
C

5. 6. 7. 8.
U Q
G A

W
B P
H t

I

627