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30 votes
Triangle ABC is similar to DEF. Which proportion can be used to find the length of DE in centimeters?

User DwlRathod
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1 Answer

14 votes
14 votes

Answer:


(DE)/(4) = (9)/(3)


DE = 12

Explanation:

Given

See attachment for triangles ABC and DEF

Required

The proportion to find DE

To solve for DE, we can make use of the following equivalent ratios;


AB:DE = BC:EF

Substitute values for AB, BC and EF


4:DE = 3:9

Express as fractions


(DE)/(4) = (9)/(3)

The above is the proportion to solve for DE

Solving further:


(DE)/(4) = 3


DE = 4 * 3


DE = 12

Triangle ABC is similar to DEF. Which proportion can be used to find the length of-example-1
User Bowman Han
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3.1k points