Answer: Any two polygons are similar if their corresponding angles are congruent and the measures of their corresponding sides are proportional: In the figure above the ratio or the scale factor of the quadrilateral to the left versus the quadrilateral to the right is ½.
Step-by-step explanation: This what I could coem up with. Hope this helps !!
You need the formula for geometric mean for right triangles as it applies to the altitude. For us, that formula will be where BD is your altitude. The formula then, filled in accordingly, would be . We cross multiply to get that . Divide both sides by 4 to get , so x = 5. Choice C is the one you want.