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Geometry Terms (Fuse Geometry) - Miles > Geometry Terms - chapter 1 > Flashcards

Geometry Terms - chapter 1 Flashcards

1
Q

acute angle

A

an angle measuring more than 0 degrees and less than 90 degrees

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2
Q

adjacent angles

A

two angles in the same plane with a common vertex and a common side, but no common interior points

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3
Q

angle

A

a figure formed by two rays with a common endpoint

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4
Q

angle bisector

A

a ray that divides an angle into two congruent angles

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5
Q

area

A

the number of nonoverlapping unit squares of a given size that will exactly cover the interior of a plane figure

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6
Q

base of a triangle

A

any side of the triangle

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7
Q

between two points

A

point B is between points A and C if and only if all three points lie on the same line, and AB + BC = AC

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8
Q

bisect

A

to divide into two congruent parts

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9
Q

circumference

A

the distance around a circle

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10
Q

collinear

A

points that lie on the same line

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11
Q

complementary angles

A

two angles whose measures have a sum of 90 degrees

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12
Q

congruent angles

A

angles that have the same measure

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13
Q

congruent segments

A

segments that have the same length

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14
Q

construction

A

creating a precise figure, using only a compass and straightedge

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15
Q

coordinate

A

a number used to identify the location of a point

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16
Q

coordinate plane

A

a plane that is divided into four regions by a horizontal line (x-axis) and a vertical line (y-axis)

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17
Q

coplanar

A

points that lie in the same plane

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18
Q

degree

A

a unit of angle measure that is 1/360th of a circle

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19
Q

diameter

A

a segment with endpoints on a circle and passing through the center of the circle

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20
Q

distance between two points

A

the absolute value of the difference of the coordinates of the points

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21
Q

endpoint

A

a point at an end of a segment or the starting point of a ray

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22
Q

exterior of an angle

A

the set of all points outside an angle

23
Q

height of a triangle

A

a segment from a vertex that forms a right angle with a line containing the base

24
Q

hypotenuse

A

the side opposite the right angle in a right triangle

25
Q

image

A

the shape resulting from a transformation of a figure known as the preimage

26
Q

interior of an angle

A

the set of all points between the sides of an angle

27
Q

leg of a right triangle

A

one of the two sides of a right triangle that form the right angle

28
Q

length

A

the distance between the two endpoints of a segment

29
Q

line

A

an undefined term; a line is a straight path that has no thickness and extends forever

30
Q

linear pair

A

a pair of adjacent angles whose noncommon sides are opposite rays

31
Q

measure of an angle

A

the number of degrees that an angle contains

32
Q

midpoint

A

the point that divides a segment into two congruent segments

33
Q

obtuse angle

A

an angle measuring more than 90 degrees and less than 180 degrees

34
Q

opposite rays

A

two rays that have a common endpoint and form a line

35
Q

perimeter

A

the sum of the side lengths of a closed plane figure

36
Q

pi

A

the ratio of the circumference of a circle to its diameter

37
Q

plane

A

an undefined term; it is a flat surface that has no thickness and extends forever

38
Q

point

A

an undefined term; it names a location and has no size

39
Q

postulate

A

a statement that is accepted as true, without proof

40
Q

preimage

A

the original figure in a transformation

41
Q

radius

A

a segment whose endpoints are the center of a circle (or sphere) and a point on the circle (or sphere)

42
Q

ray

A

a part of a line that starts at an endpoint and extends forever in one direction

43
Q

reflection

A

a transformation across a line (line of reflection) such that the line is the perpendicular bisector of every segment joining each point and its image

44
Q

right angle

A

an angle measuring 90 degrees

45
Q

rotation

A

a transformation about a point P (center of rotation) such that every point and its image are the same distance from P and all of the angles with vertex P formed by each point and its image are congruent

46
Q

segment (line segment)

A

part of a line consisting of two points (endpoints) and all of the points between them

47
Q

segment bisector

A

a line, ray, segment, or plane that divides a segment into two congruent segments

48
Q

straight angle

A

an angle measuring 180 degrees

49
Q

supplementary angles

A

two angles whose measures have a sum of 180 degrees

50
Q

transformation

A

a change in the position, size, or shape of a figure

51
Q

translation

A

a transformation that shifts or slides every point of a figure the same distance and the same direction

52
Q

undefined term

A

a basic geometric figure that is not defined in terms of other figures

53
Q

vertex of an angle

A

the common endpoint of the sides of an angle

54
Q

vertical angles

A

the nonadjacent angles formed by two intersecting lines

Geometry Terms (Fuse Geometry) - Miles (13 decks)

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