Final answer:
True, the Pythagorean theorem can be used 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:
True
The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. This theorem can be used to calculate the length of the resultant vector obtained from the addition of two vectors that are at right angles to each other. In this case, the two vectors can be considered as the legs of a right triangle, and the resultant vector is the hypotenuse. By using the Pythagorean theorem, we can find the length of the resultant vector.