SAT Math Practice Question #20426 - SATify | SATify
#20426
coordinate geometry
circles
hard
180 sec
Calculator OK
A circle in the xy-plane has a diameter with endpoints (1,3) and (7,11). An equation of this circle is (x−4)2+(y−7)2=r2, where r is a positive constant. What is the value of r?
• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-). • Fractions must be in lowest terms. • Mixed numbers must be converted to improper fractions.
