Unit 4 – Flip, Slide & Turn
description
Transcript of Unit 4 – Flip, Slide & Turn
Unit 4 – Flip, Slide & Turn
Vocabulary
Unit 4 – Flip, Slide & Turn - Vocabulary
Plane: One of the basic undefined
terms of geometry. A plane goes on
forever in all directions (in two-
dimensions) and is "flat" (i.e., it has
no thickness).
Line Segment: The part of a line
between two points on the line.
Sometimes referred to as a segment.
Unit 4 – Flip, Slide & Turn - Vocabulary
Unit 4 – Flip, Slide & Turn - Vocabulary
Line: A line has no thickness but its
length goes on forever in two
directions.
Unit 4 – Flip, Slide & Turn - Vocabulary
Point: A point has no length, width, or
thickness, and we often use a dot to
represent it.
Unit 4 – Flip, Slide & Turn - Vocabulary
Endpoint: The point at an end of
a line segment or ray.
Unit 4 – Flip, Slide & Turn - Vocabulary
Intersection: The point at which
two or more lines, rays, or line
segments meet or cross.
Unit 4 – Flip, Slide & Turn - Vocabulary
Ray: A ray begins at a
point and goes on forever
in one direction.
Unit 4 – Flip, Slide & Turn - Vocabulary
Angle: Region between
two rays or the amount of
rotation about a fixed
point.
Unit 4 – Flip, Slide & Turn - Vocabulary
Parallel Lines: Two lines that
lie in the same plane and they
do not intersect (cross) and
would not ever cross if they were
extended (railroad tracks).
Unit 4 – Flip, Slide & Turn - Vocabulary
Perpendicular Lines:
Two lines, rays or line
segments that meet or
cross at a right angle.
Unit 4 – Flip, Slide & Turn - Vocabulary
Corresponding Angles:
Angles that have the same
relative positions in
geometric figures.
Unit 4 – Flip, Slide & Turn - Vocabulary
Corresponding Sides:
Sides that have the same
relative positions in
geometric figures.
Unit 4 – Flip, Slide & Turn - Vocabulary
Congruent: Having the same
size, shape and measure.
Unit 4 – Flip, Slide & Turn - Vocabulary
Transformation: The
mapping, or movement, of all
the points of a figure in a plane
according to a common
operation.
Unit 4 – Flip, Slide & Turn - Vocabulary
Translation: A transformation
that "slides" each point of a
figure the same distance in the
same direction.
Unit 4 – Flip, Slide & Turn - Vocabulary
Reflection: A
transformation that "flips"
a figure over a mirror or
reflection line.
Unit 4 – Flip, Slide & Turn - Vocabulary
Reflection Line: A line that acts
as a mirror in the form of a
perpendicular bisector so that
corresponding points are the
same distance from the mirror.
Unit 4 – Flip, Slide & Turn - Vocabulary
Rotation: A transformation
that turns a figure about a fixed
point at a given angle and a
given direction.
Unit 4 – Flip, Slide & Turn - Vocabulary
Bisector of a line: the straight
line or ray that divides a line
segment or angle into two
congruent segments.
Unit 4 – Flip, Slide & Turn - Vocabulary
Angle of Rotation: The
number of degrees that a
figure is rotated about a
fixed point.
Unit 4 – Flip, Slide & Turn - Vocabulary
Coincide: To occupy
the same position in
space; correspond
exactly or be identical.
Unit 4 – Flip, Slide & Turn - Vocabulary
Skew: Lines not in a
plane that don’t meet.
Unit 4 – Flip, Slide & Turn - Vocabulary
Right Angle: An angle
that measures 90°.
Unit 4 – Flip, Slide & Turn - Vocabulary
Obtuse Angle: An angle
that measures more than
90° but less than 180 °.
Unit 4 – Flip, Slide & Turn - Vocabulary
Acute Angle: An
angle that measures
less than 90°.
Unit 4 – Flip, Slide & Turn - Vocabulary
Vertex: a point at which
two or more sides or
edges of a geometric
figure meet.
Unit 4 – Flip, Slide & Turn - Vocabulary
Dilation: a change in the
size of an object without
changing the shape.
Unit 4 – Flip, Slide & Turn - Vocabulary
Similar: Figures that
have the same shape.
Unit 4 – Flip, Slide & Turn - Vocabulary
Scale factor: the ratio of the
lengths of corresponding
sides in similar figures.
Unit 4 – Flip, Slide & Turn - Vocabulary
Supplementary angles – Two angles whose measures, when added together, equal 180 degrees.
Unit 4 – Flip, Slide & Turn - Vocabulary
Complementary angles – Two angles whose measures, when added together, equal 90 degrees.