Can someone help me with this math homework please!

How do i find the missing angle measure in a polygon

Cole says the distance between points (-5,0) and (0,-5)is 5 units. is he correct? explain why or why not.

You are choosing between two health clubs. club a offers membership for a fee of $ 28 plus a monthly fee of $ 20. club b offers membership for a fee of $ 20 plus a monthly fee of $ 22. after how many months will the total cost of each health club be the same? what will be the total cost for each club? in __ months the total cost of each health club will be the same.