The measures of three sides of a triangle are 9,16,and20. Determine wheather ther triangle is a right triangle

Question

The measures of three sides of a triangle are 9,16,and20. Determine wheather ther triangle is a right triangle

Answer 1

use phytagorean thorem a^2+b^2=c^2

so 9^2+16^=20^2

81+256=400

337=400  this is not true so the triangle is not a right triangle

Answer 2

I think you could just do 9 squared + 16 squared = 20 squared, if they are not equal, then they not a right triangle. It's not a right triangle. 337=400, nope! Also, there is a rule about the length of the hypotenuse must not be less than something but I forget, but no. It's not a right triangle.