Standard Form of the Equation of a Circle: (x - h)2 + (y - k)2 =r2 Distance Formula: d = (x2 -x1)2 + (v2 - y1)2 radius = -* diameter NI Midpoint Formula: MPx, MP = (21+*2 yzty1) 2 2 10). Write the equation of a circle whose endpoints of the diameter are (0, 0) and (-4, 2). 11). Write the equation of a circle whose endpoints of the diameter are (-4, -1) and (-3, -5). Leave the answers as reduced fractions