Question

In ∆ABC, AD is the bisector of ∠A meeting side BC at D, find the value of x and then find the length of CD. Set up a proportion and solve for the measure. Show your work and label your answer to get full points. See pages 179 – 182 in your reference guide.

Answer 1

30/5 * 3x/x-2 =

15x/30x-60 =

15x = 30x-60=

Subtract 15x from both sides.

30x-60-15x=15~x-15x

Group like terms.

30x-15x-60=15x-15x

Simplify

15x-60=0

Divide both sides by 15

15x/15 = 60/15

Simplify

X= 60/15

Greatest common factor

4*15/1*15

X=4

X=4 CD= 12

Explanation:

if your doing this for K12 this is all you'll need to put, very simplified but its accurate.