Opposite side

In a right-angled triangle, the "opposite side" refers to the side directly across from a specific angle, other than the right angle. For example, if you're looking at an angle within the triangle, the side that doesn't touch that angle but is directly opposite it is called the opposite side. This concept is essential in trigonometry, where it helps determine relationships between angles and side lengths. Understanding which side is opposite a given angle is key to solving various geometric and mathematical problems involving triangles.