Question

Calculate the length of DE.

Answer 1

set up the proportion, cross multiply, and solve for the missing length.

$\frac{BA}{BE} = \frac{DC}{DE}$

$\frac{6}{3} = \frac{9}{DE}$

6(DE) = 3(9)

DE = $\frac{3(9)}{6} = \frac{9}{2} = 4.5$

Answer: 4.5