<p>The Pythagorean Theorem is a fundamental rule in geometry that applies to right-angled triangles. It states that the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides. The formula is:</p> <p>a2+b2=c2</p> <p>Where:</p> <p>𝑎<br /> a and<br /> 𝑏<br /> b are the lengths of the two legs of the triangle,<br /> 𝑐<br /> c is the length of the hypotenuse.<br /> This theorem is essential for calculating distances, solving problems in trigonometry, and is widely used in fields such as architecture, physics, and engineering.</p>