The triangle in the image is not a right triangle. It is an oblique triangle, which is a triangle that has no right angles.
The triangle in the image is not a right triangle. A right triangle has one angle that is exactly 90 degrees. In the triangle in the image, none of the angles appear to be 90 degrees. Additionally, the Pythagorean theorem cannot be used to determine the length of the hypotenuse of the triangle. The Pythagorean theorem states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides. In the triangle in the image, the sides are 9 yards, 11 yards, and √115 yards. If we try to use the Pythagorean theorem, we get:

115 = 81 + 121
115 = 202
This is not true, so the triangle cannot be a right triangle.
Therefore, the triangle in the image is not a right triangle. It is an oblique triangle, which is a triangle that has no right angles.