What is the similarity ratio of δabc to δdef?
tri abc: ac=4 cb=5
tri def: df= 2

The similarity ratio of ΔABC to ΔDEF = 2 : 1.

Solution:

The image attached below.

Given  ΔABC to ΔDEF are similar.

To find the ratio of similarity triangle ABC and triangle DEF.

In ΔABC: AC = 4 and CB = 5

In ΔDEF: DF = 2, EF = ?

Let us first find the length of EF.

We know that, If two triangles are similar, then the corresponding sides are proportional.

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Ratio of ΔABC to ΔDEF =

Similarly, ratio of ΔABC to ΔDEF =

Hence, the similarity ratio of ΔABC to ΔDEF = 2 : 1.

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step-by-step explanation: