SAT Math Practice Question #8038 - SATify | SATify
#8038
equations
coordinate geometry
distance
circles
formulas
geometry
medium
75 sec
A circle in the xy-plane has a diameter with endpoints (−3,7) and (9,7). An equation of this circle is (x−3)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.
