Geometry similarity help i have no clue what to do

[Agaffney3030]

In triangle ABC AC is parallel to DE AC=x+4, DE=6, CE=x, BE=9
Name two similar triangles , prove they are similar
B) Write a proportion of their corresponding sides
C) Solve for the variable and find the value of AC

 

[MarkFL]

A.) What do we need for two triangles to be similar?

 

[Deleted member 4993]

In triangle ABC AC is parallel to DE AC=x+4, DE=6, CE=x, BE=9
Name two similar triangles , prove they are similar
B) Write a proportion of their corresponding sides
C) Solve for the variable and find the value of ACView attachment 2537

You need to read the rules of this forum. Please read the post titled "Read before Posting" at the following URL:

http://www.freemathhelp.com/forum/th...217#post322217

We can help - we only help after you have shown your work - or ask a specific question (not a statement like "Don't know any of these")

Please share your work with us indicating exactly where you are stuck - so that we may know where to begin to help you.

 

[Ranger1029]

What makes Two Triangles Similar?

A.) What do we need for two triangles to be similar?

two angle proven congruent. You don't need all three corresponding angles proven because the third is implied and must be congruent if two already are.

 

[HallsofIvy]

The question was directed at agaffney3030, to start him, hopefully, thinking about the problem.