SAT Math Practice Question #12715 - SATify | SATify
#12715
coordinate geometry
circles
geometry
hard
30 sec
A circle in the xy-plane has a diameter with endpoints (2,−1) and (12,23). An equation of this circle is (x−7)2+(y−11)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.
