A triangle has sides of 5 cm, 12 cm, and 13 cm. Is it a right triangle?

Sat, 02 May 2026 23:42:36 +0000

**A triangle has sides of 5 cm, 12 cm, and 13 cm. Is it a right triangle?**
Right now, curious learners and uninitiated enthusiasts are increasingly asking: *A triangle has sides of 5 cm, 12 cm, and 13 cm. Is it a right triangle?* This shape has long fascinated people—not just for its balance and symmetry, but for its mathematical significance. Its sides form a classic example of a right triangle, widely recognized in education, architecture, and even design. With a mobile-first audience seeking quick clarity, understanding why this classic triangle works is more relevant than ever. ### Why This Triangle Is Gaining Attention in the US Beyond classroom basics, the 5-12-13 triangle reflects growing interest in practical geometry across US life—whether in DIY projects, woodworking, fitness training, or digital content exploring STEM fundamentals. Its dimensions appear in real-world contexts: from furniture design to laser engraving setups. More importantly, it’s a gateway concept: simple yet foundational, sparking curiosity that extends beyond shapes into broader learning paths. This trend aligns with an audience seeking trustworthy, usable knowledge—especially those exploring income opportunities tied to technical skills or creative ventures. ### How This Triangle Actually Is a Right Triangle: The Math Explained