The obtuse angle of intersection of the heights is equal to the obtuse angle of a parallelogram. Area ab sin x A 3 4 sin 90 A 12 sin 90. A diagonal of a parallelogram divides it into two congruent triangles so the area of a parallelogram is twice the area of either of those triangles.
By rearranging the given irregular parallelogram into a regular figure such as a triangle we can easily find the area of an irregular parallelogram.
How did you get the. A is the corresponding altitude. Then you would subtract to get for the missing vertical side. If your problem gives you a measurement of the base and height of a.