Answer:
YES
Explanation:
To see if it is a right triangle, find the relationship using:
_
![c^2](https://img.qammunity.org/2021/formulas/physics/high-school/ogn7e3pelal5x8www4kspvhu4yx5lslaa8.png)
If the sum of a and b squared is equal to c (the Pythagorean theorem) then it is a right triangle.
Insert the values, with the biggest number being c (this is because c represents the hypotenuse, and the hypotenuse is the longest side of a triangle):
_
![39^2](https://img.qammunity.org/2021/formulas/mathematics/high-school/9q80lv4a95hywdp7fyziit3mwfraim82ne.png)
Simplify exponents:
_
![1521](https://img.qammunity.org/2021/formulas/mathematics/high-school/cwnkt6fvdvrww76531yec8f1kz0ubgolq4.png)
Simplify addition:
_
![1521](https://img.qammunity.org/2021/formulas/mathematics/high-school/cwnkt6fvdvrww76531yec8f1kz0ubgolq4.png)
Find the relationship:
![1521=1521](https://img.qammunity.org/2021/formulas/mathematics/high-school/z8pi1vsl2cgwsprsqangntais9p50a35aa.png)
It is a right triangle.
Finito.