Unit 5 Coordinate Algebra Flashcards

1
Q

acute angle

A

an angle measuring less than 90° but greater than 0°

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2
Q

angle

A

A figure created by two distinct rays that share a common endpoint (also known as a vertex).

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3
Q

angle of rotation

A

The amount of rotation (in degrees) of a figure about a fixed point such as the origin.

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4
Q

bisector

A

A point, line or line segment that divides a segment or angle into two equal parts.

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5
Q

circle

A

The set of all points equidistant from a point in a plane.

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6
Q

congruent

A

Having the same size, shape and measure.

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7
Q

corresponding angles

A

Angles that have the same relative position in geometric figures.

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8
Q

corresponding sides

A

Sides that have the same relative position in geometric figures

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9
Q

endpoint

A

The point at each end of a line segment or at the beginning of a ray.

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10
Q

image

A

The result of a transformation.

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11
Q

intersection

A

The point at which two or more lines intersect or cross.

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12
Q

isometry

A

a distance preserving map of a geometric figure to another location using a reflection, rotation or translation.

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13
Q

line

A

One of the undefined terms of geometry that represents an infinite set of points with no thickness and its length continues in two opposite directions indefinitely

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14
Q

line segment

A

A part of a line between two points on the line

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15
Q

line of symmetry

A

a line separating a figure into two halves that are mirror images.

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16
Q

line symmetry

A

exists for a figure if for every point on one side of the line of symmetry, there is a corresponding point the same distance from the line

17
Q

obtuse angle

A

an angle measuring greater than 90° but less than 180°

18
Q

parallel lines

A

Two lines are parallel if they lie in the same plane and do not intersect.

19
Q

perpendicular lines

A

Two lines are perpendicular if they intersect to form right angles.

20
Q

point

A

One of the basic undefined terms of geometry that represents a location.

21
Q

pre-image

A

A figure before a transformation has taken place.

22
Q

ray

A

A part of a line that begins at a point and continues forever in one direction

23
Q

reflection

A

A transformation of a figure that creates a mirror image, “flips,” over a line.

24
Q

line of reflection

A

A line that acts as a mirror so that corresponding points are the same distance from the mirror.

25
Q

rotation

A

A transformation that turns a figure about a fixed point through a given angle and a given direction, such as 90° clockwise.

26
Q

regular polygon

A

a two-dimensional figure with all sides and all angles congruent

27
Q

right angle

A

an angle measuring 90˚

28
Q

transformation

A

The mapping, or movement, of all points of a figure in a plane according to a common operation, such as translation, reflection or rotation.

29
Q

translation:

A

A transformation that slides each point of a figure the same distance in the same direction.

30
Q

vertex

A

The location at which two lines, line segments or rays intersect.