Question

The two triangles are similar, What is the length of DE?

Answer 1

This is easy. All you need to do is set up a proportional relationship.

A proportional relationship uses variables to show similarities, in this case, in triangles.

`(2)/(3) = (x)/(6.3)\\\\3x = 12.6\\\\x = 4.2`

x represents the missing side.