paralell ines have same slope y=2/3x-6 slope is 2/3
the equation of aline that passes through (x1,y1) and has a slope of m is y-y1=m(x-x1) given (3,14) and slope is 2/3 y-14=2/3(x-3) y-14=2/3x-2 y=2/3x+12
Diameter of the circle is BD as shown, as indicated and passed through center where BD passes, triangle ABD is a right triangle with angle ABD as the right angle. It means ADB and ABD are complementary which means AB = 140 degree AD=40 degree