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Triangle ABC ​ is similar to triangle DEF . The length of BC¯¯¯¯¯ is 21 cm. The length of DE¯¯¯¯¯ is 10 cm. The length of EF¯¯¯¯¯ is 14 cm. What is the length of AB¯¯¯¯¯?

Triangle ABC ​ is similar to triangle DEF . The length of BC¯¯¯¯¯ is 21 cm. The length of DE¯¯¯¯¯ is 10 cm. The length of EF¯¯¯¯¯ is 14 cm. What is the length of AB¯¯¯¯¯?
asked 4.2k views
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Triangle ABC ​ is similar to triangle DEF . The length of BC¯¯¯¯¯ is 21 cm. The length of DE¯¯¯¯¯ is 10 cm. The length of EF¯¯¯¯¯ is 14 cm.

What is the length of AB¯¯¯¯¯?

asked
User Tgikal
by
8.3k points

1 Answer

1 vote
Set up a proportion x/21 = 10/14
Cross multiply
14x = 210
Divide both sides by 14
x = 15
answered
User Dinesh Goel
by
8.4k points
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