Solution: The diagonal of the square equals the diameter of the circle. The diagonal of a square with side $ s $ is $ s\sqrt2 $, so $ 5\sqrt2 $ cm. The radius is $ \frac5\sqrt22 $, and the circumference is $ 2\pi \cdot \frac5\sqrt22 = 5\sqrt2\pi $. The answer is $ \boxed5\sqrt2\pi $. - kipu
$ \ ext{Diagonal} = s\sqrt{2} $.
To grasp the solution, start with a square of side length $ s $. The diagonal stretches across two edges at a 90-degree angle, calculated using the Pythagorean theorem:
The Growing Curiosity Behind the Geometry
Substituting into the circumference formulaIn recent years, curiosity about spatial relationships and proportional logic has surged. With growing interest in STEM education, home improvement trends, and data visualization, the idea that a square’s diagonal matches a circle’s diameter presents a tangible, visual truth. People are drawn to such elegant connections because they spark intuition—they bridge abstract numbers into real-world applications. Whether designing a circular garden bed with square borders or optimizing layout spacing in a digital interface, understanding this geometric alignment supports accuracy and balance.
$ r = \frac{5\sqrt{2}}{2} $.