Question

Triangle DEF is dilated by a scale factor of 2/3 to form triangle D´E´F´. What is the measure of side DE?

Answer 1

Answer:

DE = 30

Step-by-step explanation:

Let X be the measure of side DE.

You can write this equation to represent the problem:

$x *\frac{2}{3} =20$

The measure of DE (x) is multiplied by the scale factor of $\frac{2}{3}$ to become 20.

Solve for x:

$x *\frac{2}{3} =20\\\frac{2x}{3} =20\\2x=60\\x=30$

DE = 30