First graph the center at (1,2). Then use your given radius to graph four points around the center. One vertical point above and one below the center, and one horizontal point to the right and one to the left of the center. Those points should be:
• (1,5)
• (1,-1)
• (-2,2)
• (4,2)
Then, to the best of your ability, draw a circle connecting those points.
I hope this makes sense. Please let me know if you have any further questions!