9th Grade Honors Geometry Chapter 1 Terms

Question 1

Corners of a polygon

Accepted Answer

Vertex/vertices

Question 2

Two-dimensional

Accepted Answer

Plane

Question 3

Angle with a measure less than 90°

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Acute

Question 4

Polygon with 3 sides

Accepted Answer

Triangle

Question 5

Angles that are opposite of each other when two lines cross; share a vertex and are congruent

Accepted Answer

Vertical angles

Question 6

A type of line with one initial point on one end and extends indefinitely in the other direction

Accepted Answer

Ray

Question 7

When all segments of a polygon point outward

Accepted Answer

Convex

Question 8

Angle with a measure equal to 90°

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Right

Question 9

Angle with a measure equal to 180°

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Straight

Question 10

Always use _____ to label a line segment.

Accepted Answer

Endpoints

Question 11

Polygon with 8 sides

Accepted Answer

Octogon

Question 12

A closed figure formed by line segments with each side intersecting exactly two other sides

Accepted Answer

Polygon

Question 13

...unless its endpoint is shared with another angle.

Accepted Answer

True

Question 14

Looks like a table or a wall

Accepted Answer

Plane

Question 15

A type of line with a definite starting and ending point

Accepted Answer

Segment

Question 16

Is represented by a dot

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Point

Question 17

An angle can be named by its _____ or _____.

Accepted Answer

Endpoint; rays

Question 18

Adjacent, supplementary angles (form a straight angle)

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Linear pair

Question 19

Polygon with 5 sides

Accepted Answer

Pentagon

Question 20

A point that divides a segment into two congruent segments

Accepted Answer

Midpoint

Question 21

Point at which line segments intersect

Accepted Answer

Vertex/vertices

Question 22

When naming a ray, arrow always points _____.

Accepted Answer

Right

Question 23

A rule that has been proven

Accepted Answer

Theorem

Question 24

Angle with a measure greater than 90°

Accepted Answer

Obtuse

Question 25

Polygon with 7 sides

Accepted Answer

Heptagon

Question 26

Polygon with 4 sides

Accepted Answer

Quadrilateral

Question 27

Polygon with 12 sides

Accepted Answer

Dodecagon

Question 28

Angles whose sum is 90°

Accepted Answer

Complementary angles

Question 29

A ray that divides an angle into two congruent angles

Accepted Answer

Angle bisector

Question 30

Polygon with 10 sides

Accepted Answer

Decagon

Question 31

When naming a ray, begin with the _____.

Accepted Answer

Endpoint

Question 32

To divide a segment or angle into two congruent parts

Accepted Answer

Bisect

Question 33

A rule accepted without proof

Accepted Answer

Postulate

Question 34

Angles that share a common vertex and side/wall

Accepted Answer

Adjacent angles

Question 35

Each complementary angle is known as a _____.

Accepted Answer

Complement

Question 36

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

Accepted Answer

Segment bisector

Question 37

Collinear, have the same endpoints, point in opposite directions

Accepted Answer

Opposite rays

Question 38

Angles whose sum equals 180°

Accepted Answer

Supplementary angles

Question 39

When one or more vertices point inward

Accepted Answer

Concave

Question 40

Labeled with a capital letter

Accepted Answer

Point

Question 41

Polygon with 6 sides

Accepted Answer

Hexagon

Question 42

Polygon with 11 sides

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Hendecagon, Undecagon

Question 43

Polygon with 9 sides

Accepted Answer

Nonogon

Question 44

Labeled with a lowercase script letter or two points

Accepted Answer

Line

Question 45

Extends infinitely in both directions

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Line

Question 46

Each supplementary angle is known as a _____.

Accepted Answer

Supplement

Question 47

Has no dimension

Accepted Answer

Point

Question 48

Line segments with the same length

Accepted Answer

Congruent segments

Question 49

One-dimensional

Accepted Answer

Line

Question 50

The sides of a polygon are formed by _____.

Accepted Answer

Line segments

Question 51

Consists of two different rays with a common endpoint

Accepted Answer

Angle

Question 52

Points on the same line

Accepted Answer

Collinear

Question 53

Angles with the same measure

Accepted Answer

Congruent angles

Question 54

Ending points of a line segment

Accepted Answer

Endpoints

Question 55

Points on the same plane

Accepted Answer

Coplanar

9th Grade Honors Geometry Chapter 1 Terms

Questions 55

9th Grade Honors Geometry Chapter 1 Terms

Questions 55