Geometry All Vocab

Question 1

3 Undefined Terms

Answer 1

Line, Point, and Plane

Question 2

Point

Answer 2

A location. Named with a capital letter

Question 3

Line

Answer 3

A straight path of points that is indefinitely long. Named with any 2 points on the line

Question 4

Plane

Answer 4

A flat surface of points that is indefinitely long. Named with any non-collinear points on the plane

Question 5

Collinear Points

Answer 5

3 or more points on the same line

Question 6

Non-Collinear Points

Answer 6

3 or more points not connected on the same line(cannot be connected by one line)

Question 7

Ray

Answer 7

Part of a line with an end point. Name with endpoint and one “direction point”

Question 8

Endpoint

Answer 8

Point on the end of a segment or ray

Question 9

Segment

Answer 9

Part of a line with 2 end points

Question 10

Parallel Lines

Answer 10

Lines on the same plane that don’t intersect

Question 11

Skew Lines

Answer 11

Lines that aren’t in the same plane that don’t intersect

Question 12

Parallel Planes

Answer 12

Planes that don’t intersect

Question 13

Congruent Segments

Answer 13

Line segments that have the same length

Question 14

Midpoint

Answer 14

A point that divides a segment into 2 congruent segments

Question 15

Angle

Answer 15

A figure formed from to rays that shares the same endpoint

Question 16

Vertex

Answer 16

Common endpoint shared by 2 rays of an angle

Question 17

Acute Angle

Answer 17

An angle with a measure less than 90 degrees

Question 18

Right Angle

Answer 18

An angle with a measure of 90 degrees

Question 19

Obtuse Angle

Answer 19

An angle with a measurement between 90 and 180 degrees

Question 20

Straight Angle

Answer 20

An angle with a measure of 180 degrees

Question 21

Perpendicular Lines

Answer 21

Lines that intersect to form right angles

Question 22

Complimentary Angles

Answer 22

2 angles with measures that add up to 90 degrees

Question 23

Supplementary Angles

Answer 23

2 angles with measures that add up to 180 degrees

Question 24

Linear Pairs

Answer 24

Adjacent Supplementary Angles

Question 25

Angle Bisector

Answer 25

A ray that divides an angle into two congruent angles

Question 26

Adjacent Angles

Answer 26

Angles that have a common vertex and side, but they don't overlap

Question 27

Vertical Angles

Answer 27

The non-adjacent angles formed b two intersecting lines

Question 28

Transversal

Answer 28

A line that intersects 2 or more other lines

Question 29

Interior Angles

Answer 29

Angles that are inside the parallel lines when there is a transversal line

Question 30

Exterior Angles

Answer 30

Angles that are outside the parallel lines when there is a transversal line

Question 31

Triangle

Answer 31

A three sided polygon. Name using 3 verticies

Question 32

Acute Triangle

Answer 32

Triangles w all angles less than 90 degrees

Question 33

Right Triangle

Answer 33

A triangle with one right angle

Question 34

Obtuse Angle

Answer 34

A triangle with one obtuse angle

Question 35

Isosceles Triangle

Answer 35

A triangle with at least 2 congruent sides

Question 36

Scalene Triangle

Answer 36

A triangle with no congruent sides

Question 37

Equilateral Triangle

Answer 37

A triangle with all sides congruent(all measures of angles 60)

Question 38

No sides congruent...

Answer 38

No angles congruent

Question 39

Two sides congruent...

Answer 39

Two angles congruent

Question 40

All/3 sides congruent...

Answer 40

All/3 angles congruent

Question 41

Polygon

Answer 41

A closed figure with 3 or more sides formed by conjoining segments

Question 42

Regular Polygon

Answer 42

A polygon with all sides congruent and all angles congruent

Question 43

Irregular Polygon

Answer 43

A polygon without all angles and/or sides congruent

Question 44

Diagonal

Answer 44

A segment connecting two non-consecutive vertices in a polygon

Question 45

Circle

Answer 45

All the points in a plane a given distance from a given point

Question 46

Center of a circle

Answer 46

The given point in a plane

Question 47

Radius

Answer 47

A segment with one endpoint at the center of a circle and one endpoint on the circle

Question 48

Chord

Answer 48

A segment with both endpoints on the circle

Question 49

Diameter

Answer 49

A chord that goes through the center of a circle

Question 50

Arc

Answer 50

Part of a circle

Question 51

Semicircle

Answer 51

Half the circle the ends of the diameter divide the circles into semicircles

Question 52

Circumference

Answer 52

The distance around a circle

Question 53

Quadrilateral

Answer 53

A polygon with 4 sides

Question 54

Trapezoid

Answer 54

Quadrilateral with exactly one pair of sides parallel

Question 55

Coplanar Points

Answer 55

3 or more points on the same plane

Question 56

Isosceles Trapezoid

Answer 56

A quadrilateral exactly one pair of parallel sides the other non-parallel sides congruent

Question 57

Parallelogram

Answer 57

A polygon with both pairs of opposite sides parallel and congruent

Question 58

Rectangle

Answer 58

A parallelogram with 4 right angles

Question 59

Rhombus

Answer 59

Parallelogram with all sides congruent

Question 60

Square

Answer 60

Quadrilateral with all sides and all angles congruent