Divide a parallelogram into three triangles. Given that the areas of the two shadow parts are 9 square centimeters and 12 square centimeters respectively, calculate the area of the parallelogram

Divide a parallelogram into three triangles. Given that the areas of the two shadow parts are 9 square centimeters and 12 square centimeters respectively, calculate the area of the parallelogram

I don't know where the shadow is. I think if 12 is half of a parallelogram, then the area of the parallelogram is 24. If 9 and 12 are half, then it's 42. It depends on how you divide it

The area of the parallelogram is 120 square centimeters. A and B are the points obtained by dividing diagonal 3 equally. The area of the shadow triangle is calculated. The area of the parallelogram is 120 square centimeters

The triangle is 20, because the diagonal divides the parallelogram into two parts equally. The height of the same base is equal, and the ratio of the base to the area is equal. Even if the base is the same, the area is the same. The area of the parallelogram is 120, half is 60, and it is divided into three parts equally, that is, 20 for each part

The middle point of the bottom edge of the parallelogram is a, the area of the parallelogram is 19 square centimeters, and the area of the shadow triangle is () square centimeters

If the height of the parallelogram is h and the length of the bottom edge is l, then the area of the parallelogram: S = L * H = 19. The line divides the parallelogram into a triangle and a triangle