Answer:
BC = 54
Explanation:
Don't get caught on this question. There really is enough information.
The vertical line through D can be shown to be a perpendicular bisector of AC.
That means AB = BC
6x = 9x - 27 Add 27 to both sides
6x + 27 = 9x Subtract 6x from both sides
27 = 9x - 6x
27 = 3x Divide by 3
27/3 = x
x = 9
There are two ways to find BC.
1) Find AB
AB = 6 * 9 = 54
2) Find BC
BC = 9x - 27
BC = 9*9 - 27
BC = 81 - 27
BC = 54
Good thing to remember for a test. Remember that BD is the perpendicular bisector of AC. Both segments making up AC are equal.