Final answer:
True, we can use the Pythagorean theorem to calculate the length of the resultant vector obtained from the addition of two vectors at right angles to each other.
Step-by-step explanation:
The statement is True.
According to the Pythagorean theorem, the square of the length of the hypotenuse of a right triangle is equal to the sum of the squares of the lengths of the other two sides. In this case, if two vectors are at right angles to each other, their lengths can be represented by the legs of a right triangle, and the length of the resultant vector can be represented by the hypotenuse of that triangle. Therefore, we can use the Pythagorean theorem to calculate the length of the resultant vector obtained from the addition of two vectors at right angles to each other.