chapter 7

Question 1

Basic def of similar (general object)

Answer 1

2 objects are similar if they are the same shape but different sizes

Question 2

in geo, two polygons are similar if:

Answer 2

1. all of their corresponding angles are congruent
2. The lengths of their corresponding sides are in proportion

Question 3

statement of proportionality

Answer 3

uses letters ex CW/PI = CO/PZ = DS/ZG = WS/IG

Question 4

ratios always compare _______ to another ________

Answer 4

polygon, polygon

Question 5

ORDER…

Answer 5

MATTERS

Question 6

similarity statement

Answer 6

name the shapes as you would a congruence statement than use the similarity sign

Question 7

what is the similarity sign

Answer 7

~

Question 8

what is the abbreviation for scale factor

Answer 8

S.F

Question 9

what is a scale factor

Answer 9

a ratio of two corresponding sides that both have numbers ex 10/5 or 4/2

Question 10

when setting up a proportion to find a missing side length, the first ratio is the ______ ________. The other ratio should include the _______ _______ and it’s cooresponding side

Answer 10

scale factor, unknown side

Question 11

when is the only time you use the similarity symbol

Answer 11

in the similarity statement

Question 12

AA~

Answer 12

shows 2 pairs of corresponding angles that are congruent

Question 13

SAS~

Answer 13

shows 2 pairs of coorespoding sides that are in proportion and 1 pair of corresponding angles that are congruent (the angle must be included)

Question 14

SSS~

Answer 14

shows 3 pairs of coorespoding sides that are in proportion

Question 15

the type of transformation between similar polygons is called a

Answer 15

dialation