For a right-angled triangle, the Pythagorean theorem states that the square of the length of the hypotenuse (t) is equal to the sum of the squares of the lengths of the other two sides (p and s).
According to the labeling:
- p is the height (one leg of the triangle)
- s is the base (the other leg of the triangle)
- t is the hypotenuse
Thus, the correct equation according to the Pythagorean theorem would be:
\[ t^2 = p^2 + s^2 \]
Rearranging this gives:
\[ p^2 + s^2 = t^2 \]
Correspondingly, this matches Option 2. Therefore, the correct answer is:
2