This is from Manhattan CAT 4 If AD is 6√3, and ADC is a right angle, what is the area of triangular region ABC? (1) Angle ABD = 60° (2) AC = 12 https://cdn2.manhattanprep.com/images/gmat/triangleabc/triangleabc.jpg I answered D and the correct answer is C. My reasoning: (1) If angle ABD = 60 degrees...