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Chapter 8 Vocab


An exact location that is usually represented as a dot Point
A straight path that extends without end in opposite directions Line
A perfectly flat surface that extends infinitely in all directions Plane
A part of a line, it has one endpoint and without end in one direction Ray
A part of a line or a ray that extends from one endpoint to another Line Segment
The same shape and size Congruent
2 rays with a common endpoint Angle
The common endpoint Vertex
The sum of the measures of two angles that is 90 degrees Complementary Angles
The sum of the measures of two angles that is 180 degrees Supplementary Angles
Angles formed by two intersecting lines that measure 90 degrees Perpendicular Lines
Lines in the same plan that do not intersect at all Parallel Lines
Lines that don't intersect, but they are also parallel Skew Lines
Angles that have a common vertex and a common side but not common interior points Adjacent Angles
Angles that are opposite formed by two intersecting lines Vertical Angles
A line that intersects 2 or more lines Transversal
Angles that are on the same side of the transversal and are both above or below the parallel lines Corresponding Angles
The set of all points in a plane that are the same distance from a given point called the cent Circle
The point inside a circle that is the same distance from all the points on the circle Center of a Circle
Part of a circle named by its endpoints Arc
Line segment whose endpoints are the center of a circle and any point on the circle Radius
Line segment that passes through the center of a circle, and whose endpoints lie on the circle Diameter
Line segment whose endpoints are any two points on a circle Chord
An angle formed by 2 radii Central Angle
The part of the circle enclosed by 2 radii and an arc connecting them Sector
A closed plane figure formed by 3 or more line segments Polygon
A polygon in which all sides are congruent and all angles are congruent Regular Polygon
A shape that both pairs of opposite sides are parallel and congruent. Both pairs of opposite angles are congruent Parallelogram
A parallelogram with four right angles Rectangle
A parallelogram with 4 congruent sides Rhombus
A parallelogram with 4 congruent sides and four right angles Square
A shape which exactly one pair of opposite sides is parallel Trapezoid
A rule stating that if three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent Side-Side-Side Rule
The resulting figure of a transformation Image
When a figure is not symmetrical Asymmetry
The central point Center of Rotation
Transformation that changes the size, but not the shape, of a figure Dilation
Created by: Ksmart