Please help me I don't understand how to do this

Answer:
It is a Obtuse triangle, for the ∠B measurement is 110°. To Obtuse the angle must be over 90°. An acute triangle has all angles less than 90°. A right triangle has a 90° angle. A parallelogram would have the same measurements on the sides. This problem is not a parallelogram because the measurements and 9m, 6m, and 4m.
Step-by-step explanation: