1/15 Geometry Vocab Test

Question 1

two rays that meet at a common endpoint

Answer 1

Angle

Question 2

an angle with a measure less than 90°

Answer 2

Acute angle

Question 3

the set of all points that lie the same distance from the center and lie in the same plane

Answer 3

Circle

Question 4

same size and same shape

Answer 4

Congruent

Question 5

a polygon with 6 sides 6 angles and 6 vertices

Answer 5

Hexagon

Question 6

a set of points that form a straight path that goes in opposite directions without ending

Answer 6

line

Question 7

part of a line between two endpoints

Answer 7

Line segment

Question 8

an angle whose measure is greater than 90° but less than 180°

Answer 8

Obtuse angle

Question 9

a polygon with 8 sides 8 angles and 8 vertices

Answer 9

Octagon

Question 10

lines that lie in the same plane never intersect and are the same distance apart

Answer 10

Parallel lines

Question 11

four-sided (quadrilateral) polygon with opposite sides parallel and opposite sides congruent

Answer 11

Parallelogram

Question 12

lines that intersect at right angles (90°) to each other

Answer 12

Perpendicular lines

Question 13

a polygon with 5 sides 5 angles and 5 vertices

Answer 13

Pentagon

Question 14

a flat surface that goes on forever in all directions

Answer 14

plane

Question 15

an exact location in space represented by a dot

Answer 15

Point

Question 16

a closed figure made by joining line segments where each line segment intersects exactly two others only at the endpoints

Answer 16

Polygon

Question 17

any four-sided polygon

Answer 17

Quadrilateral

Question 18

part of a line that has one endpoint and continues without end in one direction

Answer 18

Ray

Question 19

four-sided polygon (quadrilateral) with 4 right (90°) angles adjacent sides perpendicular opposite sides congruent and opposite sides parallel

Answer 19

Rectangle

Question 20

an angle that measures 90° with lines that are at a right angle to each other are perpendicular

Answer 20

Right angle

Question 21

four-sided polygon (quadrilateral) having all four sides congruent and opposite sides parallel

Answer 21

Rhombus

Question 22

four-sided polygon (quadrilateral) with all sides congruent and opposite sides parallel with 4 right (90°) angles and adjacent sides perpendicular

Answer 22

Square

Question 23

four-sided polygon (quadrilateral) with exactly one pair of parallel sides

Answer 23

Trapezoid

Question 24

a polygon with 3 sides 3 angles and 3 vertices

Answer 24

Triangle

Question 25

a figure that has two basic units of measurement (usually length and width)

Answer 25

Two-dimensional figure

Question 26

the point (corner) of intersection of two edges in a two-dimensional figure

Answer 26

Vertex (plural - vertices)