Question

Given: D is the midpoint of AB and E is the midpoint of BC.

Find the value of x if AC=30 and DE=2x+1

Answer 1

@hartnn can u help

Answer 2

@Hero or @tkhunny can u help me please

Answer 3

@whatchalookinat can u help

Answer 4

Here is what I think. Since the line creates midpoints which divide AB and BC evenly, we have a 1:2 ratio for side lengths BD and BA as well as BE and BC.

Answer 5

Knowing that, we see that we have similar triangles, and can also say that side DE must be 1/2 of AC.

Answer 6

DE=AC*1/2

Answer 7

Thus 2x+1=15
x=7.
Don't take my word for this, I haven't done geometry in almost 3 years.

Answer 8

ok i believe u right i got that as my answer choice