



 
Hi Alexa, In my mind I see a diagram. The points in the plane that are 5 units from (2, 1) make up the circle with center (2, 1) and radius 5. You want the points on this circle with xcoordinate 2, the points labeled P and Q in the diagram. I then added a point R to complete the right triangle PCR. What does Pythagoras tell you? Write back if you need more assistance,  


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