Vocabulary Geometry

Helpfulness: +4
Set Details Share
created 10 years ago by fmarlatt
12,479 views
These terms compliment the Pearson enVision math series for fourth grade
updated 8 years ago by fmarlatt
Grade levels:
4th grade
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:
1

point

card image

an exact location in space

2

acute angle

card image

an angle that is less than 90 degrees and smaller than a right angle

3

Hexagon

card image

a polygon with 6 sides and 6 vertices

4

intersecting lines

card image

the 2 line segments cross each other at a point

5

parallel lines

card image

lines that are equal distance apart at every point and they never intersect
The strips on the monarch caterpillar are parallel.

6

symmetric
symmetrical
lines of symmetry

card image

a figure is symmetric if it can be folded into 2 congruent halves that fit on top of each other. The line of symmetry divides the valentine heart into 2 congruent shapes.

7

line

card image

a straight path of points that goes on forever in both directions

8

plane

card image

an endless flat surface

9

perpendicular lines

card image

2 lines that intersect at a right angle

10

line segment

card image

part of a line that has 2 end points

11

ray

card image

part of a line that has 1 end point and extends forever in one direction

12

angle

card image

a figure formed by 2 rays that have the same endpoint

13

right angle

card image

an angle that measures exactly 90º

14

obtuse angle

card image

and angle that measures more than 90º

15

straight angle

card image

an angle that measures exactly 180º

16

polygon

card image

a closed shape made up of line segments

17

side

card image

each of the line segments of a polygon

18

vertex, vertices

card image

the point where 2 rays meet to form an angle. the points where the sides of a polygon meet.

19

triangle

card image

a polygon with 3 sides and 3 angles

20

quadrilateral

card image

a polygon with 4 sides and 4 angles

21

pentagon

card image

a polygon with 5 sides and 5 angles

22

octagon

card image

a polygon with 8 sides and 8 angles

23

parallelogram

card image

a quadrilateral in which the opposite sides are parallel

24

rectangle

card image

a parallelogram with 4 right angles

25

square

card image

a parallelogram with 4 right angles and all sides the same length

26

rhombus

card image

a parallelogram with all sides the same length

27

trapezoid

card image

a quadrilateral with only 1 pair of opposite sides that are parallel

28

equilateral triangle

card image

a triangle with 3 equal sides

29

isosceles triangle

card image

a triangle that has 2 equal sides

30

scalene triangle

card image

a triangle that has no sides that as the same length

31

right triangle

card image

a triangle with 1 right angle

32

acute triangle

card image

a triangle with 3 acute angles

33

obtuse triangle

card image

a triangle with one obtuse angle

34

congruent

card image

2 shapes that are the same shape and the same size

35

similar

card image

2 shapes that are the same shape but not the same size

36

classify

card image

To arrange in groups, by some property.

These shapes are classified by the number of sides.

37

ellipse

card image

a 2 dimensional shape that resembles a flatten circle
An ellipse has only 2 lines of symmetry

38

equiangular

card image
39

two dimensional

card image

a shape that has height and width but no depth, Squares, Circles, Triangles, etc are two dimensional objects

40

congruent polygons

card image

2 polygons that are the same shape and same size