基本几何形把值编码为边角与对称携带意义的闭合轮廓。欧几里得《几何原本》（约前300年）仍命名学校套件；现代界面在复用。
工作报告、广告与作业中适合图标、海报、练习纸、品牌标志。若需要编码数量时用图表，不要漂亮的三角，换一种形式。
Parts
- 标记 — The core mark of 基本几何形 is 边角与对称携带意义的闭合轮廓.
- 尺度 — The scale must show zero (or a declared break) and units.
- 轴 — Axis titles name the variable, not a mood.
- 图例 — A legend is weaker than a direct label. Write beside the mark when you can.
- 标签 — Numbers are optional. If comparison is the job, label the ends only.
- 网格 — Keep the grid faint. Data should own the ink.
- 注释 — One annotation sentence. Date the source.
- 外框 — A thin frame. Never a 3-D box.
Variants
- 图元 — Variant 1 of 基本几何形. Same encoding, different layout.
- 欧几里得套件 — Variant 2 of 基本几何形. Same encoding, different layout.
- 海报立体 — Variant 3 of 基本几何形. Same encoding, different layout.
- 基本几何形 4 — Variant 4 of 基本几何形. Same encoding, different layout.
Labels
- 轴 — On 基本几何形, make Mark readable.
- 图例 — On 基本几何形, make Scale readable.
- 标签 — On 基本几何形, make Axis readable.
- 网格 — On 基本几何形, make Legend readable.
- 注释 — On 基本几何形, make Label readable.
基本几何形: honour 边角与对称携带意义的闭合轮廓, and switch when 需要编码数量时用图表，不要漂亮的三角.