Question

1. Line segment AC touches the circle at a single point B. Line segment OB extends through the center of the circle.

Answer 1

AC is a tangent to the circle

A tangent is perpendicular to the diameter of the circle, so B is 90 degrees

Radius is half the diameter, so 3.5*2 = 7m

Area = (pi)(r^2), so (pi)*3.5^2 = 38.48m^2