I need help i dont get it

What is the area of the triangle on the flag of the philippines in inches

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?

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?