triangle that has three acute angles -...

Cobb County 4th Grade 1 2010-2011

Fourth Grade Vocabulary

acute angle

angle whose measure is greater than 0º and less than 90º

A

B C

acute triangle triangle that has

three acute angles


area model

x 6

198

33

associative property

grouping numbers in different ways resulting with the same product or sum

(32 + 48) + 56 = 32 + (48 + 56)

angle

two rays or line segments that share the same endpoint


36 + 48 + 52 = 36 + 52 + 48

two or more numbers added or multiplied in any order resulting in the same sum or

product

commutative property

method for locating points using a plane formed by two intersecting and perpendicular number lines called axes

coordinate system

cube rectangular prism with six

square faces


cylinder

3-dimensional object with two parallel circular bases

data information gathered; facts or figures

from which conclusions are drawn

decimal

number with one or more digits to the right of the decimal point

3.57

3.3cyl

inder


decimal point

symbol used to separate dollars and cents in money and the ones place from the

tenths place in decimals

3.57 $5.65

degree

unit used for measuring angles and temperatures

denominator

lower number of a fraction which tells how many parts are in the whole or in the group

3

5


diagonal line

line segment joining two non-adjacent vertices of a

polygon

distributive property 25 x 43

(20 x 40) + (20 x 3) + (5 x 40) + (5 x 3)

3 X 8 + 3 X 4 = 3 X (8 + 4)

dividend

the number that is to be divided in a division problem

21 ÷ 7 = 3

21 ÷ 7 = 3

567


divisor

7

the number that divides the dividend

21 ÷ 7 = 3

equilateral triangle

triangle that has 3 sides equal in length and 3 angles equal

in size

edges

line segments where two or more faces of a solid figure meet


two or more fractions that name the same amount

equivalent fraction

=

estimate find out about how many or how

much 36 is about 40

evaluate

= 1 + 9

= 10

find the value of a mathematical expression


expanded form

way to write numbers by showing the value of each digit

3000 + 400 + 20 + 7 = 3,427

expression + 23 – 14

mathematical phrase (part of the number sentence) that combines numbers and operation signs but does not have an equal sign (2+4)-5

face polygons that form flat surfaces

on a solid figure


factor

s numbers that are multiplied together

to find a product

4 X 6 = 24

full rotation

360°movement of a figure around a fixed point

gram

metric unit for measuring weight (mass)


half rotation

180°movement of a figure around a fixed point

1 100

hundredths

one hundred equal parts

37.76

improper fraction fraction in which the numerator is greater than or equal to the denominator


interpret

give the meaning of or explain

isosceles triangle triangle with 2 sides equal in length

and 2 angles equal in size.

kilogram

metric unit for measuring weight (mass)


like denominators fractions with denominators that

are the same 6 2

6 5

line straight path of points that has no

beginning or end

line graph graph that uses a line to show how data changes

over a period of time


line plot

graph that uses symbols above a number line to represent data

median middle score (or scores) when a set of scores are written in order of size

3

3

4

6

7

line segment

part of a line that includes two endpoints

G A


six places to the left of the ones place

million 3,000,000

mixed fraction

an amount given as a whole number

and a fraction 4

3

3

3

3

4

6

7

mode

the score that occurs most often in a set of scores


net

flat pattern that can be used to make a three-dimensional object

numerator

the top number of a fraction, which tells how many parts are being counted out of the total number of equal parts

multiple number that is the product of a given number

and a whole number

7 X 8 = 56 56 is a multiple of 7 and also 8


ordered pair pair of numbers used to locate a point on a coordinate grid

(2, 4)

obtuse angle angle whose measure

is greater than 90° and less than 180°

obtuse triangle

triangle that has one obtuse angle


ounce standard unit for measuring weight

parallel

lines in the same plane that never intersect and are always the

same distance apart

parallelogram

quadrilateral whose opposite sides are parallel


partial product

products when the ones, tens and hundreds are multiplied separately

38 X 9

54(6X9)

270(30X8)

324

perpendicular two lines or line segments that intersect to form right angles

graph that uses symbols to show data

pictograph

Key

= 2 cats

Sam

Sue


place value value of a digit according to its place in a number 7,382 the value of 7 = 7,000

plane

flat surface that extends indefinitely in

all directions

plane figure two-dimensional shape


polygon

closed plane figure formed by three

or more line segments and angles

point an exact location in

space

pound

customary unit of weight 1 lb = 16 oz


product

name given to the answer in a multiplication problem

or or

proper fraction fraction where the numerator is less than

the denominator

prism

triangular prism

rectangular prism


protractor tool for

measuring the size of an angle

pyramid has one base which gives the

pyramid its name, all other faces are triangles

quotient 28 ÷ 2 = 14

name given to the answer in a division problem


ray line which has a definite starting

point but no end

range difference between the least and

greatest value in a set of data

2, 4, 5, 6, 7, 7, 8, 9, 10, 10, 11

9

rectangular prism

solid figure in which all six faces are rectangles


rhombus parallelogram with all four sides

equal in length

remainder amount left over when a number cannot

be divided equally

43 ÷ 8 = 5 r 3

regular polygon

polygon with all sides and angles congruent


angle which forms a square corner; has a measure of 90°

right angle

right triangle

triangle with one 90° angle

rotation

movement of a figure to a new position by turning it around a vertex or point of

rotation


scalene triangle

triangle in which no sides are equal in length; no angles are equal in size

solid figure

3-dimensional figure

way to write numbers using the digits 0 - 9

352 4,672

standard form


straight angle

angle that measures 180°

symbol

word, picture, or number used instead of words

+ = __

tenths 546.6

ten equal parts 1

10


customary unit used to measure weight 1 T = 2,000 lbs

ton

trapezoid quadrilateral with exactly one

pair of parallel lines

trend changes in data over time


Venn diagram uses circles to show relationships among sets

vertex/vertices

point at which 2 or more straight lines meet

weight

how heavy or light an object is in numbers


x-axis horizontal line in a coordinate system

or on a coordinate plane

x

y y-axis vertical line in a coordinate system

or on a coordinate plane

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