A rectangles diagonal is 13 cm, and one side is 5 cm. What is the length of the other side?

Wed, 06 May 2026 14:29:40 +0000

**A rectangles diagonal is 13 cm, and one side is 5 cm. What is the length of the other side?** Why are so many curious users turning to questions about geometry right now? A simple rectangle measuring 13 cm across its diagonal with one side at 5 cm sparks interest—not just among DIY enthusiasts, but also digital learners, builders, and parents solving real-world puzzles. This shape equation isn’t just math—it’s a gateway to understanding proportions, measurements, and design logic across everyday applications. When a rectangle’s diagonal and one side are known, finding the missing length reveals the intersection of algebra and spatial reasoning. Using the Pythagorean theorem, the formula becomes clear: diagonal² = width² + height². With a 13 cm diagonal and a 5 cm side, math shows the other dimension is √(13² – 5²) = √(169 – 25) = √144 = 12 cm. This precise balance between dimensions influences everything from furniture design to smartphone displays—showing how foundational geometry shapes modern life. Why is this question gaining traction? In a US market increasingly focused on practical knowledge and visual learning, concise, accurate explanations like this satisfy mobile users seeking quick clarity. The topic connects to growing interests in interior design, smartphone specifications, DIY projects, and architecture—each demanding precise measurements and dimensional logic. People aren’t just asking “what if”—they’re building, measuring, and trusting reliable solutions.