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CRCT REVIEW

- MATH
- You are going to do great!!!

PLACE VALUE

ORDERED PAIR

- (1,2)
- A pair of numbers used
- to locate a point on a
- coordinate plane
- the first number tells
- how far to move
- horizontally
- and the second number
- tells how far
- to move vertically

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relation

- A set of ordered pairs

Example (5,1) (10,2) (15,3)

(20,4) (25,5)

GREATEST COMMON FACTOR

- The greatest factor that two or more numbers have

in common Example 18 1, 2, 3, 6, 9, 18

30 1, 2, 3, 5, 6, 10, 15, 30 6 is the GCF of

18 and 30.

MULTIPLES

- multiple
- The product of a given whole number and another

whole number

Example

percent

- The ratio of a number to 100 percent means "per

hundred

measure of central tendency

- A measure used to describe data the mean,

median, and mode are measures of central

tendency.

mean

- The number found by dividing the sum of a set of

numbers by the number of addends see also

average Example 74, 91, 63, 92, 85

mode

- The numbers or items that occur most often in a

set of data Example The mode of 1, 3, 4,

4, and 6 is 4.

median

- The middle number or the average of the two

middle numbers in an ordered set of data

Example The median of 1, 3, 4, 6, and 7 is

4.

range

- The difference between the greatest and least

numbers in a set of data Example The

greatest temperature is 83F. The least

temperature is 80F. Since 83 - 80 3, the range

is 3F.

number line

- A line with equally spaced tick marks named by

numbers (POSITIVE AND NEGATIVE INTEGERS) - Example

A number written as the product of all its prime

factors

prime number

- A whole number greater than 1 whose only factors

are 1 and itself - Example 1,2, 3, 5,
- Not prime 4, 8, 12,

composite number

- A whole number that has more than two factors
- Example 21 1, 3, 7, 21
- Example 4 1, 2, 4

parallel lines

- Lines in a plane that never intersect

perpendicular lines

- Two lines that intersect to form four right

angles

congruent Having the same size and shape

Example The

triangles are congruent.

line of symmetry

- A line that divides a figure into two congruent

parts

similar figures Figures with the same shape but

not necessarily the same size

FACE

- A polygon that is a flat surface of a solid

figure

Right Triangle

- A RIGHT triangle has ONE right angle.

obtuse triangle A triangle that has one obtuse

angle Example

Acute Triangle

- An ACUTE triangle has THREE acute angles.

- The ratio of the circumference of a circle to its

diameter

circumference The distance around a circle

Example

Diameters -

- A DIAMETER of a circle is a chord that contains

the center of the circle. Diameter CV, diameter

DT, diameter GH, diameter EU, etc.....

Radius

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

- acute angle
- An angle that has a measure less than a right

angle (less than 90) Example

Straight Angle

- A STRAIGHT ANGLE is one whose measure is EXACTLY

180 DEGREES. A straight angle is made up of two

opposite rays. Another important fact is that a

straight angle forms a straight line.

Obtuse Angle

- An OBTUSE ANGLE is one whose measure is GREATER

THAN 90 AND LESS THAN 180 DEGREES.

Right Angle

- A RIGHT ANGLE is an angle whose measure is

EXACTLY 90 DEGRRES. Right angles are denoted by a

small square in its interior.

VERTEX -

- The common point for both rays is called the

Vertex.

Identify the Triangles

- Triangles are also classified according to their

length. - Scalene Triangle- no congruent sides
- Isosceles Triangle- two congruent sides
- Equilateral Triangle- three congruent sides

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area The number of square units needed to cover

a surface Example

The area is 9 square units.

Perimeter

- The distance
- around a figure
- 2 cm 3 cm 3 cm
- 8 cm The perimeter of this figure is 8

centimeters

VOLUME

- The measure of the amount of space a solid figure

occupies

The volume of this figure is 24 cubic units

PRISM

- A solid figure that has two congruent,

polygon-shaped bases, and other faces that are

all rectangles

pyramid

- A solid figure with a polygon base and all other

faces triangles that meet at a common vertex

Associative Property

- The property that states that the way addends are

grouped or factors are grouped does not change

the sum or the product

12 (5 9) (12 5) 9 (9 x 8) x 3 9 x

(8 x 3)

Commutative Property

- The property that states that when the order of

addends or factors is changed, the sum or product

is the same

9 4 4 9 6 x 3 3 x 6

greater than (gt)

A symbol used to compare two numbers, with the

greater number given first Example 8 gt 6 8

is greater than 6.

FRACTION

- A number that names a part of a whole or a part

of a group