HELP!
x=
ill have a pic below

Question

HELP!
x=
ill have a pic below

anonymous · Answer

|dw:1365183269237:dw|

e.mccormick · Answer

Ah.  Right angles.  That means those two lines are parallel.  So that brings us back to something like the last problem.

anonymous · Answer

ok I understand

e.mccormick · Answer

|dw:1365176217723:dw|
So I can extend the lines, and that makes it look more like the last one

e.mccormick · Answer

So, with what we did a few minutes ago, have any thoughts?  OH!  And where is the x?

anonymous · Answer

ohh its not 20 deg. its 2x

anonymous · Answer

sorry my bad

e.mccormick · Answer

ah!  OK.  I thought the 20 was odd.  LOL.  Those should also be similar triangles because they share the diagonal, are bounded by parallel lines, and the 90 corner.

e.mccormick · Answer

Now, if they are similar triangles, do you remember what that means about their angles?

anonymous · Answer

that they have similar angles

e.mccormick · Answer

Same angles and sides that are related by a ratio.  But we are dealing with angles at the moment.  So which angles match up.  The easy one is the 90s.  But which others are the same as each other?

anonymous · Answer

so 2x and 50 are the same

e.mccormick · Answer

Yes.  2x=50, solve for x.

anonymous · Answer

x=25

e.mccormick · Answer

Yep!  Not hard math, but I think their point is learning the rules about what makes angles the same.

anonymous · Answer

ya im not good at that I understand them but when it comes to a problem I I don't understand how to use thm..thantk you for your hlep

e.mccormick · Answer

np.  If you want to see more worked examples, Khan Academy has a whole section of geometry where he does this in the videos.  What angle matches with which and why.  In one he calls it the angle game.  LOL

anonymous · Answer

ill have to cheek it out

e.mccormick · Answer

Welp, off to work!  Don't have too much fun here!