What is the value of b?

Question

anonymous · Answer

attachment

tkhunny · Answer

Here's a plan...Show your work.

We are not here to do your homework for you.
We can't be there on your exam.
You have Theorems for these things.  It is time to figure out what they mean.

thomaster · Answer

@tkhunny
Not every user is automatically a cheater.
Try at least to give some clues on how to solve this problem rather than directly respond like that.

@linzie693
Try to indicate what you already know about this problem, maybe you already know how to solve a part of it. Other users can then help you with the parts you don't understand.

anonymous · Answer

thanks @thomaster but I was going to just ignore him.

mathstudent55 · Answer

This is the key to this problem.
|dw:1375922261985:dw|

mathstudent55 · Answer

@linzie693
|dw:1375922400079:dw|
Can you find the value of x in the figure above?

anonymous · Answer

142?

mathstudent55 · Answer

Great. Now look at the following drawing:
Now you can get a easily. What is a?

|dw:1375922798085:dw|