Scaling & Similarity Flashcards
What is a scale copy?
A copy of an original figure in which every length in the original figure is multiplied by the same number
What is scale factor?
The number that each distance in the original figure is getting multiplied by
True or False:
Scale copies are always larger than the original
FALSE
Complete the sentence:
If the scale factor is greater than 1, then the scale copy will be …
larger than the original figure
Complete the sentence:
If the scale factor is equal to 1, then the scale copy will be…
congruent to the original figure
Complete the sentence:
If the scale factor is less than 1, then the scale copy will be…
smaller than the original figure
A side length in the original figure and its matching side length in the new figure are called…
Corresponding sides
An angle in the original figure and its matching angle in the new figure are called…
Corresponding angles
What word means “three times the size of”
Triple
What word means “twice the size of”
double
What word means “four times the size of”
Quadruple
How is the perimeter of a scaled copy related to the perimeter of the original figure?
new perimeter = scale factor * original perimeter
How is the area of a scaled copy related to the area of the original figure?
new area = (scale factor^2) * original area
How is the volume of a scale copy related to the volume of the original figure?
new volume = (scale factor^3) * original volume
