Pre-image ABCD was dilated to produce image AꞌBꞌCꞌDꞌ.

What is the scale factor of the similar figures? Enter the answer in simplest form.

https://static.k12.com/calms_media/media/1574000_1574500/1574341/1/7c653a9e4580b079984107720771f0faf6c71488/MS_IMC-141231-111313.jpg

Question

Pre-image ABCD was dilated to produce image AꞌBꞌCꞌDꞌ. 
 
What is the scale factor of the similar figures? Enter the answer in simplest form.

https://static.k12.com/calms_media/media/1574000_1574500/1574341/1/7c653a9e4580b079984107720771f0faf6c71488/MS_IMC-141231-111313.jpg

welshfella · Answer

the image is smaller than the pre-image so the scale factor will be < 1
Given the  measures 12 and 9 what do you the scale factor is?

knov · Answer

BC=B'C'-3

welshfella · Answer

it can be written as a fraction  < 1  agreed?

vespersaviour · Answer

I think the scale factor is 3 but i'm not sure... and agreed.

welshfella · Answer

no - 3 would mean that  the image's sides would be  3 times the sides of the pre-image.

welshfella · Answer

12 * scale factor = 9
so scale factor =  ?

knov · Answer

@welshfella is right. |dw:1459525216506:dw|