SAT Math Practice Question #8040 - SATify | SATify
#8040
equations
coordinate geometry
distance
circles
formulas
geometry
medium
75 sec
A circle in the xy-plane has a diameter with endpoints (1,1) and (9,7). An equation of this circle is (x−5)2+(y−4)2=r2, where r is a positive constant. What is the value of r2?
• 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.
