7-1 Lines & Planes and 7-2 Angles

Question 1

point

Answer 1

A location. A point has no size. You name a point by a capital letter.

Question 2

line

Answer 2

A series of points that extend in opposite directions without an end. You name a line by any two points on the line or by a lowercase letter.

Question 3

ray

Answer 3

Part of a line with one endpoint and all points in the line of one side of the endpoint. You name a ray by using two points starting with the endpoint.

Question 4

segment

Answer 4

Part of a line with two endpoints and all points in between. You name a segment by its endpoints.

Question 5

plane

Answer 5

Flat surface that extended indefinitely in all directions and has no thickness.

Question 6

intersecting lines

Answer 6

• Lie on the same plane.
• Have exactly one point in common.

Question 7

parallel lines

Answer 7

• lines in the same plane that never intersect
• parallel segments and rays lie in parallel line

Question 8

skew lines

Answer 8

• lie in different planes
• they are neither parallel nor intersecting

Question 9

classify

Answer 9

To arrange or group things according to their characteristics

Question 10

sketch

Answer 10

to draw something without using a scale

Question 11

identify

Answer 11

to recognize and be able to tell what something is

Question 12

45 degree angle

Answer 12

half of a right angle

Question 13

90 degree angle

Answer 13

a right angle

Question 14

135 degree angle

Answer 14

a right angle and a 45 degree angle

Question 15

180 degree angle

Answer 15

a straight angle

Question 16

angle

Answer 16

an angle is formed by 2 rays with a common endpoint called a vertex

Question 17

vertex

Answer 17

the vertex of an angle is the point of intersection of two sides of an angle

Question 18

acute angle

Answer 18

an acute angle is an angle with a measure between 0 and 90 degrees

Question 19

obtruse angle

Answer 19

an obtruse angle is an angle with a measure greater than 90 degres and less than 180

Question 20

right angle

Answer 20

a right angle is a triangle with one right angle.

Question 21

straight angle

Answer 21

a straight angle is an angle with a measure of 180 degrees

Question 22

complementary

Answer 22

two angles are complementary if their sum of their measures is 90 degrees

Question 23

supplementary

Answer 23

supplementary angles are two angles whose measures add to 180 degrees

Question 24

adjacent angles

Answer 24

anjacent angles share a vertex and a side but have no interior points in common

Question 25

vertical angles

Answer 25

• Vertical angles are formed by two intersecting lines.
• Vertical angles are opposite each other.

Question 26

congruent angles

Answer 26

congruent angles are angles that have the same measure