Do you really need help with this?
We can draw a square around the triangle, then take out parts of it to make the shaded triangle.
The square around it has an area of 16. (4x4=16)
The three triangles we take out of the square to get the shaded triangle have an area of:
2, 4.5, and 2
Add them up to find 8.5
16-8.5 is 7.5
I think it's relatively simple...
This is from RSM. Stop cheating on your homework, and if you can't solve it, make sure the level is right for you. You can ask questions, but if you are in 3rd grade, you shouldn't be on the internet. At least tell what you started with. If it is a harder problem, and you didn't show work, people would help you. Make sure you listen in class, and understand the material, or it's no use.