Solvs for x.
A.x = 27

B.x = 1

C. x = 25

D. x = 3

Question

Solvs for x. 
A.x = 27

 B.x = 1

 C. x = 25

 D. x = 3

miguel980 · Answer

Help please!

miguel980 · Answer

@hartnn please help

hartnn · Answer

this question belongs to topic similarity of triangles or parallel lines?

miguel980 · Answer

I'm not so sure if it's about parallel lines but I'm sure about triangles.

hartnn · Answer

ok, so can u prove DBE and ABC triangles similar?

miguel980 · Answer

I can't tell if the sides are proportional.

hartnn · Answer

can't ? 
if u prove triangles are similar, then using the fact that sides are proportional, u can get x .....

miguel980 · Answer

SO I compare the side AB to side BD

hartnn · Answer

since lines are parallel, corresponding angles are equal
can u prove those 2 triangles using this fact by AA test for similarity ?

miguel980 · Answer

What's the AA test? I haven't heard of that.

hartnn · Answer

when two pairs of angles of 2 triangles are equal, then 2 triangles are similar by AA test

hartnn · Answer

so here u have 2 corresponding pairs which are equal because the lines are parallel, which makes the two triangles similar, got this ?

miguel980 · Answer

OH! Ok I get it. Thanks for the help but I have to go.

hartnn · Answer

okk...we'll continue, when u return :)