I dont get this someone help please

Answer:
See the work below because showing your work requires multiple steps.
Step-by-step explanation:
So this question is basically asking you to find the area of both the triangle and the square to prove that their areas are identical.
You're going to need two equations to solve this problem:
Triangle: A = 1/2bh
Square: A = bh
These are because a triangle is essentially half of a square/rectangle.
So, first find the area of the triangle:
A = 1/2bh
A = 1/2 (2)(4)
A = 1/2 (8)
A = 4 units squared (4 units^2)
Then, find the area of the square:
A = bh
A = (2)(2)
A = 4 units squared (4 units^2)
After finding the areas for both the triangle and the square, it becomes clear that the two shapes have the same area. (This should be enough work to prove that the area is the same but feel free to let me know if you need more help!!! :D)