47.6k views
15 votes
What’s the scale factor ?

What’s the scale factor ?-example-1

1 Answer

7 votes

Answer: Choice C) 2

=======================================================

Step-by-step explanation:

The vertical side of the blue triangle is PR = 2

The corresponding vertical side of the green triangle is P'R' = 4

The scale factor is the ratio of those two corresponding sides. So we divide the two side lengths.

scale factor = (P'R')/(PR) = (4)/(2) = 2

---------------------

We could also say:

scale factor = (R'Q')/(RQ) = (6)/(3) = 2

Or you could find the lengths of PQ and P'Q' through the distance formula, or Pythagorean theorem, and apply the same idea as shown above.

User Alexey Odintsov
by
7.5k points

No related questions found