SSS since no other angles are given
Answer:
AB=5.83
Step-by-step explanation:
Distance Formula=

Plugging our values in, we get:

And if we solve it like this:

We end up with:

Which is about 5.83
Answer:
485y to the power 2 + 5x to the power 2 - 6xy to the power 3 + 7
Step-by-step explanation:
I hope this helps. Also, there's this free app called Quick Math. If you need the steps, you should check there first, and maybe you should try that for other math problems as well.
Good luck and have a great rest of your day.
Answer:

Step-by-step explanation:
You would use the equation, 
r= radius, n = number of sides
the answer to your problem is 6