An area or vicinity; the surrounding region (used in expressions like "around here").
この辺にコンビニはありますか。
Is there a convenience store around here?
駅の辺は夜になると人が多い。
The area around the station gets crowded at night.
海辺よりも山辺のほうが空気がきれいだ。
The air is cleaner near the mountains than by the sea.
In mathematics/geometry: a side or edge of a figure (e.g., a polygon's side or a polyhedron's edge).
三角形の三つの辺の長さを求めてください。
Please find the lengths of the three sides of the triangle.
立方体の各辺は同じ長さである。
All edges of a cube have the same length.
多角形の内角と辺の関係を確認する。
Check the relationship between the interior angles and the sides of the polygon.
Circumstances or situation; used to refer to the state or particulars of something (often in phrases like "those circumstances").
その辺の事情は私にはよく分からない。
I don't really know the circumstances around that.
君の言っている辺をもう少し詳しく説明してくれないか。
Could you explain a bit more about the point you're talking about?
最近の経済の辺をまとめて報告する。
I'll summarize and report on the recent economic situation.