# Triangle abc is similar to triangle def. the length of bc is 21cm. the length of de is 10 cm. the length of ef is 14 cm.

Triangle abc is similar to triangle def. the length of bc is 21cm. the length of de is 10 cm. the length of ef is 14 cm. what is the length of ab?

## This Post Has 4 Comments

1. jachecj3269 says:

It's a similar triangle so the ratios of corresponding sides should be equal which means

BC/EF = AB/DE
21/14 = AB/10
AB = 21/14 * 10 = 15 cm

2. fryday3111 says:

So we have to fine the dialation first. so BC and EF are similar because those are the two corresponding lines. divide 21 and 14. the dialation is 1.5 AB corresponds with DE so multiply 10 by 1.5. so AB is 15 the other answer is incorrect hope this helped you have a good day!!!

3. gracie2492 says:

I think the length is 26

4. michael3677 says:

15 got 100% on test..