Mathematics

The key insight is the Pythagorean theorem: in any right triangle, the sum of the squares of the two shorter sides equals the square of the longest side. Here, you need to figure out which of your three lengths is the hypotenuse (the longest side opposite the right angle), then apply $a^2 + b^2 = c^2$ to solve for $x$. Since 60 cm is already quite long, consider whether it's the hypotenuse or one of the legs.

The key insight is the Pythagorean theorem: in any right triangle, the sum of the squares of the two shorter sides equals the square of the longest side. Here, you need to figure out which of your three lengths is the hypotenuse (the longest side opposite the right angle), then apply $a^2 + b^2 = c^2$ to solve for $x$. Since 60 cm is already quite long, consider whether it's the hypotenuse or one of the legs.