Solution:
Note that :
![2500=50^2\\e\text{ }40^2+20^2=2000](https://img.qammunity.org/2023/formulas/mathematics/college/p1sp2p43b3f05zd3wxdcciiojmbndm3oqa.png)
and If the square of the length of the longest side of a triangle is equal to the sum of the squares of the other two sides, then the triangle is a right triangle. In this case, this statement is not true. We can conclude that it is not a right triangle.