Similarity Chapter 6
Proportional Sides
(n.) corresponding sides with lengths that form equal ratios
polygon
A closed plane figure made up of line segments
Scale factor
A factor by which a figure is enlarged or reduced.
perpendicular
Intersecting at or forming right angles
Similar figures
Same shape but not necessarily the same size
perimeter
The distance around the border of the figure.
Congruent
Two figures that have the same shape and size.
ratio
a comparison of two numbers by definition
image
a copy of a figure
image
a copy of an object formed by reflected or refracted rays of light
CAPS
a good way to remember that to be similar, a figure has corresponding angles AND proportional sides
vertex
an angle in a polygon
degrees
how an angle is measured
Corresponding angles
matching angles in similar shapes, which have equal measures
Corresponding sides
matching sides of two similar figures
length
the longest side
dimensions
the measurements of a polygon such as length and width
width
the shortest side
double
to use a scale factor of 2
triple
to use a scale factor of 3
quadruple
to use a scale factor of 4
proportion
two ratios set equal to each other