Question

Help me with this practice pox I need help

Answer 1

1.

`a^2+b^2=c^2`
So...

`a^2+9=225`

`a = √(216) = 6 √(6)`

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

`7^2+9^2=12^2`
If this is true, the triangle is a right triangle.

`49+81=144?`
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.

`a^2+16^2=25^2`

`a^2= 369`

`a = √(369)`
Can you calculate the area now?

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