Can someone help with this?

Me find the missing dimension of a triangle height: 7 in., area: 21^2

Pete is making decorations for a dinner party. the instructions tell him to use 9 flowers for a medium-sized decoration. complete each statement to adjust the flowers for different-sized decorations based on these instructions.

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .