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## CRCT REVIEW

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### obtuse triangle. A triangle that has one obtuse angle. Example: ... Obtuse Angle. An OBTUSE ANGLE is one whose measure is GREATER THAN 90 AND LESS THAN 180 ... – PowerPoint PPT presentation

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Title: CRCT REVIEW

1
CRCT REVIEW
• MATH
• You are going to do great!!!

2
PLACE VALUE
3
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

4
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5
relation
• A set of ordered pairs

Example (5,1)       (10,2)       (15,3)
(20,4)       (25,5)
6
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.

7
MULTIPLES
• multiple
• The product of a given whole number and another
whole number

Example
8
percent
• The ratio of a number to 100 percent means "per
hundred

9
measure of central tendency
• A measure used to describe data the mean,
median, and mode are measures of central
tendency.

10
mean
• The number found by dividing the sum of a set of
average Example 74, 91, 63, 92, 85

11
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.

12
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.

13
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.

14
number line
• A line with equally spaced tick marks named by
numbers (POSITIVE AND NEGATIVE INTEGERS)
• Example

15
A number written as the product of all its prime
factors
16
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,

17
composite number
• A whole number that has more than two factors
• Example 21 1, 3, 7, 21
• Example 4 1, 2, 4

18
parallel lines
• Lines in a plane that never intersect

19
perpendicular lines
• Two lines that intersect to form four right
angles

20
congruent Having the same size and shape
Example                                The
triangles are congruent.
21
line of symmetry
• A line that divides a figure into two congruent
parts

22
similar figures Figures with the same shape but
not necessarily the same size

23

24
FACE
• A polygon that is a flat surface of a solid
figure

25
Right Triangle
• A RIGHT triangle has ONE right angle.

26
obtuse triangle A triangle that has one obtuse
angle Example

27
Acute Triangle
• An ACUTE triangle has THREE acute angles.

28
• The ratio of the circumference of a circle to its
diameter

29
circumference The distance around a circle
Example
30
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.....

31
• A line segment with
• one endpoint
• at the center
• of a circle
• and the other
• endpoint
• on the circle

32
• acute angle
• An angle that has a measure less than a right
angle (less than 90) Example

33
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.

34
Obtuse Angle
• An OBTUSE ANGLE is one whose measure is GREATER
THAN 90 AND LESS THAN 180 DEGREES.

35
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.

36
VERTEX -
• The common point for both rays is called the
Vertex.

37
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

38
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39
area The number of square units needed to cover
a surface Example
The area is 9 square units.
40
Perimeter
• The distance
• around a figure
• 2 cm 3 cm 3 cm
• 8 cm The perimeter of this figure is 8
centimeters

41
VOLUME
• The measure of the amount of space a solid figure
occupies

The volume of this figure is 24 cubic units
42
PRISM
• A solid figure that has two congruent,
polygon-shaped bases, and other faces that are
all rectangles

43
pyramid
• A solid figure with a polygon base and all other
faces triangles that meet at a common vertex

44
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)
45
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
46
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.
47
FRACTION
• A number that names a part of a whole or a part
of a group

48