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Math Terms > Geometry > Flashcards

Geometry Flashcards

Learn Geometry Terms

1
Q

pyramid

A

polygon for a base and triangular sides; they are named by their polygon base

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2
Q

prism

A

2 parallel polygons for bases and rectangular sides; they are named by their polygon bases

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3
Q

cube

A

a special rectangular prism made of square bases and sides

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4
Q

cone

A

circular base and a curved surface and one vertex (point) (when the curved surface is spread out flat, it is similar to a triangle)

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5
Q

cylinder

A

2 parallel circular bases and a curved surface (when the curved surface is spread out flat, it is in the shape of a rectangle

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6
Q

surface area

A

the total area of all the sides of a 3-D shape

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7
Q

area of a triangle

A

½ times base times height

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8
Q

area of a rectangle

A

length times width

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9
Q

area of a circle

A

pi times radius squared pi times radius times radius

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10
Q

surface area of rectangular prism

A

two times the quantity length times width plus length times height plus width times height

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11
Q

surface area of cube

A

six times length of side squared six times length of side times length of side

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12
Q

surface area of cylinder

A

the quantity two times pi times radius times height end quantity plus the quantity two times pi times radius squared

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13
Q

surface area of cube

A

six times length of side squared six times length of side times length of side

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14
Q

surface area of cylinder

A

the quantity two times pi times radius times height end quantity plus the quantity two times pi times radius squared

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15
Q

volume

A

amount of space enclosed in a solid Note: B is area of base

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16
Q

volume

A

amount of space enclosed in a solid Note: B is area of base

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17
Q

90-x

A

complement of an angle

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18
Q

(ab)ⁿ

A

aⁿbⁿ (Raising a product to a power)

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19
Q

a⁰

A

1

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20
Q

(M × 10ⁿ)/(N x 10₂)

A

(M/N) × 10ⁿ⁻²

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21
Q

a⁴

A

a・a・a・a

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22
Q

5.704 × 10⁻⁸

A

0.00000005704

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23
Q

Acute Triangle

A

A triangle with three acute angles

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24
Q

a⁻ ⁿ

A

1/aⁿ (Negative Exponents)

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25
Q

adjacent angles

A

two angles that share a side, share a vertex, and have no common interior point

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26
Q

a¹

A

a

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27
Q

a⁴

A

a・a・a・a

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28
Q

aⁿa²

A

aⁿ⁺² (Product Rule)

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29
Q

Acute Angle

A

An angle that is smaller than a right angle (<90⁰)

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30
Q

Addition Property

A

If a = b, then a + c = b + c.

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31
Q

Addition Property

A

If a = b, then a + c = b + c.

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32
Q

adjacent angles

A

two angles that share a side, share a vertex, and have no common interior point

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33
Q

aⁿ/a²

A

aⁿ⁻² (Quotient Rule)

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34
Q

angle

A

two rays that share an endpoint

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35
Q

angle bisector

A

rays, line segments, or lines that divide and angle into two equal parts

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36
Q

AREA

A

the measurement of a two dimensional object enclosed by a boundary

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37
Q

Area of a Circle

A

If the radius of a circle is r, it’s area is (pi)r squared.

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38
Q

Bisect

A

To divide into two equal parts.

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39
Q

CIRCUMFERENCE

A

The distance around a circle.

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40
Q

Circumference

A

The perimeter of a circle (C=2πr)

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41
Q

Circumference of a Circle

A

If the diameter of a circle is d, its circumference is (pi)d.

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42
Q

collinear points

A

points on the same line

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43
Q

Complementary Angles

A

Two angles whose sum is 90 degrees.

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44
Q

COMPLEMENTARY ANGLES

A

two anglethat add up to 90 degrees

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45
Q

Complementary Angles

A

Two angles whose sum is 90 degrees.

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46
Q

congruent line segments

A

two line segments with equal lengths

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47
Q

CONVERSION FACTOR

A

a ratio of equivalent measurements used to convert a quantity from one unit to another

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48
Q

CROSS PRODUCTS

A

A cross product of two fractions is the product of the numerator of one fraction with the denominator of the other fraction.

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49
Q

Decagon

A

10-sided polygon

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50
Q

diagonal

A

a line segment that connects two non-adjacent vertices

51
Q

Diameter

A

The radius of a circle times two

52
Q

Dodecagon

A

12-sided polygon

53
Q

DOMAIN

A

the lowest to the highest number within a set of “X” values

54
Q

Equiangular Polygon

A

A polygon with all equal angle measures

55
Q

Equilateral Triangle

A

A triangle where all three sides have the same length

56
Q

Heptagon

A

7-sided polygon

57
Q

Hexagon

A

A polygon with 6 sides.

58
Q

inverse

A

the statement formed by negating both the hypothesis and conclusion of a conditional statement

59
Q

Isosceles Triangle

A

A triangle that has at least two sides of equal length

60
Q

line

A

made up of points and has no thickness or width (undefined term)

61
Q

Line Segment

A

A part of a line bounded by two endpoints with a length that can be measured.

62
Q

Midpoint

A

The point on a line segment that divides the line segment into two equal halves.

63
Q

Nonagon

A

9-sided polygon

64
Q

obtuse

A

type of triangle that contains exactly one obtuse angle

65
Q

Obtuse Angle

A

An angle that is larger than a right angle and smaller than a straight angle (between 90⁰ and 180⁰)

66
Q

Obtuse Triangle

A

A triangle with one obtuse angle

67
Q

Octagon

A

A polygon with 8 sides.

68
Q

Parallel

A

Lines that lie in the same plane and do not intersect.

69
Q

Parallelogram

A

A quadrilateral that has two pairs of parallel sides

70
Q

Pentagon

A

5-sided polygon

71
Q

PERIMETER

A

The distance around a figure

72
Q

Perpendicular

A

Lines that form a right angle.

73
Q

pi (π)

A

The exact number of times the diameter of a circle will go around the circle. Pi is an irrational number, but sometimes we use the approximation 3.14.

74
Q

plane

A

a flat surface made up of points; has no depth and extends indefinitely in all directions (undefined term)

75
Q

Point of Intersection

A

The point where two lines cross.

76
Q

Polygon

A

A two-dimensional figure that is bounded by line segments and lies on a plane.

77
Q

PRISM

A

a solid figure that has two congruent, parallel polygons as its bases. Its sides are parallelograms.

78
Q

PROPORTION

A

an equation that states that two ratios are equal

79
Q

Pythagorean Theorem

A

The square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.

80
Q

Quadrilateral

A

A polygon with 4 sides.

81
Q

Radius

A

The distance from the center of a circle to any point on the circle.

82
Q

RANGE

A

the lowest to the highest number within a set of “Y” values

83
Q

RATE

A

A ratio of two quantities measured in different units.

84
Q

RATIO

A

a comparison of two numbers by division

85
Q

ray

A

a type of line that has one endpoint

86
Q

Rectangle

A

A parallelogram with four right angles

87
Q

regular polygon

A

a polygon where all the sides and angles are congruent

88
Q

regular polygon

A

a polygon where all the sides and angles are congruent

89
Q

Rhombus

A

An equilateral parallelogram

90
Q

Quadrilateral

A

4-sided polygon

91
Q

Rhombus

A

An equilateral parallelogram

92
Q

Right Angle

A

The angle made by perpendicular lines (90⁰)

93
Q

Right Angle

A

The angle made by perpendicular lines (90⁰)

94
Q

Right Triangle

A

A triangle that has one right angle

95
Q

Right Triangle

A

A triangle that has one right angle

96
Q

SCALE

A

the ratio between the size of something and a representation of it

97
Q

SCALE

A

the ratio between the size of something and a representation of it

98
Q

SCALE DRAWING

A

A drawing of an object that is different in size (usually smaller than the original) but keeps the same proportions

99
Q

SCALE DRAWING

A

A drawing of an object that is different in size (usually smaller than the original) but keeps the same proportions

100
Q

SCALE FACTOR

A

The ratio used to enlarge or reduce similar figures

101
Q

SCALE FACTOR

A

The ratio used to enlarge or reduce similar figures

102
Q

SCALE MODEL

A

A model of an object in which the dimensions are in proportion to the actual dimensions of the object.

103
Q

SCALE MODEL

A

A model of an object in which the dimensions are in proportion to the actual dimensions of the object.

104
Q

scalene

A

type of triangle where all sides are different lengths

105
Q

scalene

A

type of triangle where all sides are different lengths

106
Q

Scalene Triangle

A

A triangle where all three sides have different measures

107
Q

Scalene Triangle

A

A triangle where all three sides have different measures

108
Q

Scientific notation

A

m×10ⁿ or 10ⁿ, A method of writing or displaying numbers in terms of a decimal number between 1 and 10 multiplied by a power of 10.

109
Q

Scientific notation

A

m×10ⁿ or 10ⁿ, A method of writing or displaying numbers in terms of a decimal number between 1 and 10 multiplied by a power of 10.

110
Q

SIMILAR

A

Figures that have the same shape but not necessarily the same size

111
Q

SIMILAR

A

Figures that have the same shape but not necessarily the same size

112
Q

SIMPLIFY

A

to write an expression in a simpler form

113
Q

SIMPLIFY

A

to write an expression in a simpler form

114
Q

skew lines

A

if two lines are not on the same plane, they cannot intersect

115
Q

skew lines

A

if two lines are not on the same plane, they cannot intersect

116
Q

space

A

a boundless, three-dimensional set of all points; can contain lines and planes

117
Q

space

A

a boundless, three-dimensional set of all points; can contain lines and planes

118
Q

Square

A

A rhombus with four right angles

119
Q

Square

A

A rhombus with four right angles

120
Q

Straight Angle

A

Two right angles form a straight angle (180⁰)

121
Q

Straight Angle

A

Two right angles form a straight angle (180⁰)

122
Q

Supplementary Angles

A

Two angles whose sum is 180 degrees.

123
Q

Supplementary Angles

A

Two angles whose sum is 180 degrees.

Math Terms (9 decks)

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