Triangle has ___ sides.

**The reasoning** A triangle is a **polygon** (closed shape made of straight lines) defined by having exactly **three sides** and **three angles**. In fact, the word "triangle" literally comes from "tri" (meaning three) and "angle." The three sides connect at three vertices (corner points), and that's what makes it a triangle. Whether it's an equilateral triangle (all sides equal), isosceles (two sides equal), or scalene (all sides different), every triangle must have exactly **3 sides** — no more, no less. **Why the wrong options tempt you** - **A) 2** — Two lines can't enclose a space; you need at least three lines to form a closed shape - **C) 4** — Four sides make a quadrilateral (like a square or rectangle), not a triangle - **D) 5** — Five sides make a pentagon; again, too many for a triangle These options test if you know basic geometric definitions. **Quick takeaway** Remember: "**TRI**angle = **THREE** sides" — the name itself tells you the answer!