Question

Use a proportion to find the missing side length, x. Triangle A B C dilated to form triangle D E F. In triangle A B C, side A B measures 10 and side B C measures 4. In triangle D E F, side D E measures x and side F E measures 2. Enter your answer, in simplest form, in the box.

Answer 1

x = 5

Explanation:

Here's your proportion:

DE/AB = EF/BC

x/10 = 2/4

Multiplying by 10 gives you ...

x = 10·2/4 = 5

The missing side length, x, is 5.