Ecs 6Th Grade Math

Front 1

adjacent angles

Back 1

two angles that share both a side and a vertex

Front 2

supplementary angles

Back 2

two angles whose sum is exactly 180 degrees

Front 3

perpendicular lines

Back 3

lines that intersect and form a right angle

Front 4

line

Back 4

a straight path that extends without end in opposite directions

Front 5

parallel lines

Back 5

lines in the same plane that never intersect

Front 6

protractor

Back 6

a device for measuring angles

Front 7

skew lines

Back 7

lines that are not in the same plane and do not intersect

Front 8

straight angle

Back 8

an angle that measures exactly 180 degrees

Front 9

point

Back 9

an exact location

Front 10

vertical angles

Back 10

a pair of opposite congruent angles formed by intersecting lines

Front 11

plane

Back 11

a flat surface that extends without end in all directions

Front 12

obtuse angle

Back 12

an angle that measures more than 90 degrees

Front 13

angle

Back 13

formed by two rays with a common endpoint

Front 14

acute angle

Back 14

an angle that measures less than 90 degrees

Front 15

complementary angles

Back 15

two angles whose sum is exactly 90 degrees

Front 16

congruent angles

Back 16

angles that have the same measure

Front 17

intersecting lines

Back 17

lines that cross at one common point

Front 18

vertex

Back 18

the point of an angle where the two sides intersect

Front 19

line segment

Back 19

made of two endpoints and all the points between the endpoints

Front 20

right angle

Back 20

an angle that measures exactly 90 degrees

Front 21

ray

Back 21

has one endpoint, then extends without end in one direction only

Front 22

polygon

Back 22

a closed plane figure made up of several line segments

Front 23

regular polygon

Back 23

a polygon in which all the sides and angles are congruent

Front 24

obtuse triangle

Back 24

a triangle with an obtuse angle

Front 25

isosceles triangle

Back 25

a triangle with at least 2 equal sides

Front 26

pentagon

Back 26

a five sided polygon

Front 27

congruent

Back 27

having the same size and shape

Front 28

scalene triangle

Back 28

a triangle with three unequal sides

Front 29

triangle

Back 29

a three sided polygon

Front 30

rectangle

Back 30

a parallelogram with four right angles

Front 31

hexagon

Back 31

a six sided figure

Front 32

rhombus

Back 32

a parallelogram with four congruent sides

Front 33

acute triangle

Back 33

a triangle with all acute angles

Front 34

parallelogram

Back 34

a quadrilateral where opposite sides are parallel and congruent

Front 35

equilateral triangle

Back 35

a triangle with three equal sides

Front 36

square

Back 36

a special rectangle with four congruent sides; a special rhombus with four right angles

Front 37

octagon

Back 37

an eight sided polygon

Front 38

quadrilateral

Back 38

a four sided polygon

Front 39

right triangle

Back 39

a triangle with a right angle

Front 40

trapezoid

Back 40

a quadrilateral that has exactly one pair of parallel sides

Front 41

translation

Back 41

movement of a figure along a straight line

Front 42

reflection

Back 42

flips a figure over a line, creating a mirror-image

Front 43

transformation

Back 43

moves a figure without changing its shape or size

Front 44

line of reflection

Back 44

a line that a figure is flipped across to create a mirror-image

Front 45

line of symmetry

Back 45

the line that reflects a geometric figure into two congruent portions

Front 46

symmetry

Back 46

when half of a figure is an exact mirror-image of the other(it can be folded or reflected so that the two parts of thefigure match, or are congruent)

Front 47

tessalation

Back 47

a repeating arrangment of one or more shapes that completely cover a plane with no gaps and no overlaps

Front 48

median

Back 48

the middle value when the data is arranged in numerical order

Front 49

similar

Back 49

figures that have exactly the same shape but not necessarily the same size

Front 50

range

Back 50

the difference between the least and greatest value in the set

Front 51

percent

Back 51

ratio of a number to 100

Front 52

mean

Back 52

the sum of all the items, divided by the number of items in the set

Front 53

tip

Back 53

an amount added to a bill for service

Front 54

equivalent ratio

Back 54

ratios that name the same comparison

Front 55

corresponding angles

Back 55

angles in a figure that are congruent

Front 56

mode

Back 56

the value or values that occur the most in a set of data

Front 57

sales tax

Back 57

amount added to the prices of an item

Front 58

proportion

Back 58

an equation that shows that 2 ratios are equivalent

Front 59

ratio

Back 59

comparison of 2 quantities using division

Front 60

corresponding sides

Back 60

lengths in a figure that are proportion

Front 61

discount

Back 61

an amount that is subtrcted from the regular price of an item

Front 62

unit rate

Back 62

a rate when the second quantity is to one unit

Front 63

rate

Back 63

ratio that compares 2 quantities that have different units