40 points
the endpoints of the diameter of a circle are at (1,2) and (7,-6), what is the circumference of the circle, to the nearest tenth of a unit?
a. 15.7 units
b. 31.4 units
c. 62.8 units
d. 78.5 units

You’re gonna use the midpoint formula to find the radius: (1+7/2, 2-6/2) and get (4,-2). Now you use the distance formula to find the radius which would be √(1-4)^2 + (2-(-2)^2 and get 5 (√= square root of). Now you plug that into the circumference equation C= 2 x pi x 5 and get 31.4 units. Sorry that took me so long and hope this helps you out!!

Idon't know and i'm a teacher