The congruence of the 2 triangles can be proved, angle C is common , CD is common, CA = CB, THEN the 2 triangles are congruent, the 2 triangles are equal so AD = DB hence CD bisects AB.
AND just that a attitude does not divides a line into equal half's, in an obtuse angle triangle the altitude is outside, only the median can divide a line into 2 equal half's or a triangle
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explanation: h stands for hotdogs, p for pretzels, and d for drinks. c represents the total cost. each price next to the variable describes the profit per item.