00:01
Here we have two similar shapes and they're asking for the scale factor.
00:04
So looking at the two sides that we have in both, a to d is 8 and e to h is 6.
00:13
So you're going to make that a fraction and say 8 over 6 and then you can reduce that to 4 3rds.
00:23
So the scale factor is 4 3rds.
00:26
So then to find ef, i'm going to use my scale factor.
00:30
So 4 3rds equals and then ef is here which corresponds to the 25.
00:37
So i'm going to say 25 over x and then use cross multiply to solve for x.
00:44
So 25 times 3 is 75 equals 4x and then 75 divided by 4 is 18 .75.
00:57
Okay now we'll do the same thing for fg which is y and corresponds with 12.
01:06
So i use my scale factor again and i say equals 12 over y.
01:13
I cross multiply so 12 times 3 is 36 equals 4y.
01:20
36 divided by 4 is 9.
01:25
So y is 9 and then gh same thing.
01:29
So take 4 3rds.
01:31
Gh is z corresponding with the 20...