Chapter 9 Vocab

Question 1

Point

Answer 1

An exact location in space

Question 2

Ray

Answer 2

Part of a line that continues without end in one direction and the other end has one endpoint

Question 3

Line

Answer 3

A straight path continuing without end in two opposite directions

Question 4

Line segment

Answer 4

Part of a line with two endpoints

Question 5

Vertex

Answer 5

Point at which two line segments or rays meet to form an angle

Question 6

Degrees

Answer 6

A unit of angle measure. The symbol is °

Question 7

Protractor

Answer 7

Instrument used for measuring angles

Question 8

Acute angle

Answer 8

An angle with a measure LESS than 90°

Question 9

Obtuse angle

Answer 9

An angle with a measure MORE than 90°

Question 10

Right angle

Answer 10

An angle with a measure of exactly 90°

Question 11

Straight angle

Answer 11

An angle with a measure of exactly 180°

Question 12

Turn

Answer 12

One fourth, one half, three fourths, or a full turn which correspond to angles of 90°, 180°, 270°, and 360°

Question 13

Inner scale

Answer 13

Inner set of readings on a protractor

Question 14

Outer scale

Answer 14

Outer set of readings on a protractor