Me with this practice pox i need

1.

So...



2. 
In right triangles, the formula I used in number 1 can be used to determine if a triangle is a right triangle.

If this is true, the triangle is a right triangle. 

No, 49+81=130, so the triangle is not a right triangle..

For number 3, use the Pythagorean theorem to find side NP so we can calculate the area.



Can you calculate the area now? 

I hope this helps clear things up. If you still need assistance, leave a comment. :)