Unit 2 Vocabulary (Geometry)

Question 1

Theorem

Answer 1

A conjecture or statement that you prove true

Question 2

Postulate

Answer 2

An accepted statement of fact

Question 3

Midpoint

Answer 3

A point that divides a segment into two congruent segments

Question 4

Segment Bisector

Answer 4

A line, segment, ray, or plane that intersects a segment at its midpoint

Question 5

Angle

Answer 5

Formed by 2 rays with the same endpoint

Question 6

Sides (of an angle)

Answer 6

The rays that form an angle

Question 7

Vertex (of an angle)

Answer 7

The common endpoint of the rays of an angle

Question 8

Acute angle

Answer 8

Angle that measures less than 90, but more than 0

Question 9

Obtuse angle

Answer 9

Angle that measures less than 180, but more than 90

Question 10

Right angle

Answer 10

Angle that measures 90

Question 11

Straight angle

Answer 11

Angle that measures 180

Question 12

Congruent

Answer 12

Same shape and size

Question 13

Adjacent angles

Answer 13

Angles with a common side and vertex, but no common interior points

Question 14

Vertical angles

Answer 14

Angles whose sides form two pairs of opposite rays

Question 15

Complementary angles

Answer 15

Angles whose measures add to 90

Question 16

Supplementary angles

Answer 16

Angles whose measures add to 180

Question 17

Linear pair

Answer 17

Adjacent angles that form a line

Question 18

Linear pair postulate

Answer 18

If two angles form a linear pair, they are supplementary

Question 19

Angle bisector

Answer 19

A ray that divides an angle into two congruent angles

Question 20

Segment addition postulate

Answer 20

If three points A, B, and C are collinear and B is between A and C, the AB+BC=AC

Question 21

Angle addition postulate

Answer 21

If point B lies in the interior of angle AOC then m angle BOC=m angle AOC

Question 22

Transversal

Answer 22

A line that intersects two or more lines in a plane at different points is called a transversal