The two triangles below are similar. What is the similarity ratio of ΔABC to ΔDEF?

Triangle ABC is shown with AC measuring 4 and BC measuring 5. Triangle DEF is shown with side DF measuring 2.

2:1
1:2
2:5
5:2

Question

The two triangles below are similar. What is the similarity ratio of ΔABC to ΔDEF?

Triangle ABC is shown with AC measuring 4 and BC measuring 5. Triangle DEF is shown with side DF measuring 2.

 2:1
 1:2
 2:5
 5:2

anonymous · Answer

@mathmate

anonymous · Answer

@sourwing

mathmate · Answer

Can you start by drawing the two triangles and marking the lengths on them, please?

anonymous · Answer

okay i did @mathmate

mathmate · Answer

Oh, I thought you draw it here!

anonymous · Answer

oh so u want a picture of the problem?? @mathmate

mathmate · Answer

Yes, drawn by you!
|dw:1437340712467:dw|
add the side lengths

mathmate · Answer

|dw:1437341176847:dw|
So I completed the drawing, and I am sure you would be able to finish the problem with what you have learned about similar triangles.

mathmate · Answer

By the way, scale factor is the size of image divided by the size of the preimage.