Math coordinate geometry question help!?
Math coordinate geometry question help!?
The diagram shows the quadrilateral ABCD. The coordinates of A and of B are ( -3a, 4a+1), where a >0, and (0,1) respectively. C and D lie on the x-axis. A straight line from D bisect AB perpendicularly at M. The length of AB is 5 units.
a) A straight line drawn from the y-axis cuts C bisects angle BCD. Find the equation of this straight line.
b) A circle is drawn on the 2nd quadrant such that the points A, M and D lie on its circumference. Find the area of the circle​
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