Final answer:
After applying the Pythagorean theorem, it's clear that a triangle with sides of 4, 6, and 9 inches is not a right triangle because the sum of the squares of the two shorter sides does not equal the square of the longest side.
Step-by-step explanation:
To determine whether a triangle with side lengths of 4 inches, 6 inches, and 9 inches is a right triangle, we can use the Pythagorean theorem.
According to the theorem, for a triangle to be a right triangle, the square of the length of the longest side (the hypotenuse) must equal the sum of the squares of the other two sides.
To check this, we calculate: 4² + 6²
= 16 + 36
= 52 and 9² = 81.
Because 52 is not equal to 81, the triangle with sides of lengths 4, 6, and 9 inches is not a right triangle.