Answer:
161.92 is the radius
If you want, you can round it to 162 units
6. 1 is at the bottom and 6 is at the top.
i dont have much time to go through all the work but i can tell you that since its a 90 degree angle, your equation would be 90=15x-2+7x+4. Once you get the value of X plug that into each of the equations. For example if your x value was 2 you would do 15(2)-2. Thats just an example.