The area of a triangle is half the area of a parallelogram, right?

The area of a triangle is half the area of a parallelogram, right?

No, it's right when equal sides and equal heights

Two triangles of equal area can form a parallelogram______ (judge right or wrong)

For example: two triangles with the length of 4 and the height of 3 and the length of 2 and the height of 6 have the same area, but they cannot be combined into parallelogram. Two triangles with the same area can be combined into parallelogram, which is wrong

1. Two triangles of equal area must be able to form a parallelogram, right?
2. In a triangle, the ratio of degree of internal angle is 1:2:3. It must be a right triangle, right? Hurry~~~~

1. No, it must be two congruent triangles
2. Yes, the trigonometric degrees are 30, 60 and 90