For each set of measures, choose whether the conditions determine a unique triangle, more than one triangle, or no triangle.

How do you answer this question? (step by step)

Mr. brettler is hanging up a 5-foot tall rectangular welcome sign in the gym. he has drawn a sketch on a coordinate grid. he has the lower vertices of the sign at (9, –3) and (–6, –3). where would the upper vertices be on the grid?

Extra points! find the missing dimension! need asap