A “Pythagorean Theorem Calculator” is a tool that helps users find the length of a side in a right triangle using the formula \( a^2 + b^2 = c^2 \). By inputting the lengths of two sides, it quickly calculates the length of the third side, making it easy to solve geometric problems. This calculator is essential for students, teachers, and professionals in fields like mathematics, engineering, and architecture. It simplifies complex calculations and enhances understanding of the Pythagorean theorem. Users can visualize the relationship between the triangle’s sides and apply it to various practical scenarios.