is this a right triangle or no

Answer:
No
Step-by-step explanation:
You can determine if a triangle is a right triangle using the Pythagorean theorem:
[tex]a^2+b^2=c^2\\leg^2+leg^2=hypotenuse^2[/tex]
Insert the given values. In a right triangle, the hypotenuse will always be the longest side, so the greatest number is c:
[tex]4^2+7^2=11^2[/tex]
Simplify the exponents (x²=x·x):
[tex]16+49=121[/tex]
Simplify addition:
[tex]65=121[/tex]
Since the result is not true, the triangle is not a right triangle.
:Done