Download Chapter 13 flashcard terms

A line is a set of points that form a straight path
that goes in opposite directions without ending
A
Line
B
AB
A point is an exact location in space,
represented by a dot.
Point
.x
Point X
A line segment is part of a line between two
endpoints.
D
Line Segment
E
DE
A ray is a line that has an endpoint and
goes on forever in one direction.
Ray
GH
Intersecting lines are lines that meet or
cross at a point
Perpendicular lines are lines that meet or
cross to make a square corner (right angles).
Lines that are the same distance apart.
Parallel lines do not intersect.
The equals sign (=) is made up of parallel
lines.
Intersecting Lines
Perpendicular
lines
Parallel lines
A plane is a flat surface that goes on forever
in all directions
Plane
Line segments that have the same length are
called congruent line segments .
Congruent line segments
Right angle
A right angle measures 90°
Acute angle
An acute angle measures between 00° to 90°
Obtuse angle
An obtuse angle measures between 90
90° to 180°
An angle is formed by two rays with a common
endpoint.
Angle
A vertex is the point where the two rays meet.
(Plural form of vertex is vertices.)
Vertex
The unit used to measure an angle is called a
degree( ° )
An isosceles triangle at least two sides
congruent.
An equilateral triangle all sides congruent.
Degree
Isosceles triangle
Equilateral triangle
A scalene triangle no sides congruent.
Scalene triangle
An acute triangle
gle three(3) acute angles.
Acute triangle
A right triangle one 90 °.
An obtuse triangle one angle more than 90 °.
Right triangle
Obtuse triangle
A polygon that has 4 sides and 4 angles
angles.
A square, rectangle, and parallelogram are
all quadrilaterals.
A quadrilateral with
*four right angles
*opposite sides are congruent
*opposite sides are parallel.
A quadrilateral with
*four right angles
*all sides are congruent
*opposite sides are parallel.
A quadrilateral with
*four right angles
*opposite sides are congruent
*opposite sides are parallel.
The door of your classroom is a rectangle.
A quadrilateral with
*all sides are congruent
*opposite sides are parallel.
A quadrilateral with exactly one pair of
opposite side parallel.
Quadrilateral
uadrilateral
Rectangle
Square
Parallelogram
Rhombus
Trapezoid
Transformation
A transformation is a movement of a
geometric figure. The resulting figure is
called the image.
The resulting figure from the movement of a
geometric figure is called an image.
Translation- sliding a figure without turning
it. A translation does not change the size or
shape of a figure.
Image
Translation
Reflection - flipping a figure over a line to
create a mirror image.
Reflection
The line that a figure is flipped over is called
the line of reflection.
e of reflection
Line
Rotation - rotating a figure about a point.
Rotation is also called a turn. (It does not
change the size or shape of figure.)
Rotation