As long as we know the length of the right base of the green triangle, let the length of the right base be x, x/ 10=6/ 16, and calculate x=3.75. According to the triangle area formula, the area is: 3.75 times 10, divided by 2 equals 18.75.

I said another way of thinking, with pictures: The picture finally appeared.

Now we don't need to ask the length of the bottom DH of the triangle ADH. Directly: Triangle ADH and Triangle GDH have equal bottoms, and the ratio of their heights is 10:6. Triangle ACG area is 16 times 10 divided by 2 equals 80, and triangle ACD area is 10 times 10 divided by 2? 50, so the sum of the areas of triangle ADH and triangle GDH is 80-50=30, and their height ratio is 10:6, so the area ratio is also 10:6, so the area of triangle ADH is 30 times that of1016, which is equal to.