How to create an equilateral triangle, a regular square, and other regular polygons

Office 2016
For some charts, diagrams and presentations, you need to create a regular polygon – equiangular (all angles are equal) or equilateral (all sides have the same length). E.g., equilateral triangle, regular square, etc.
Equilateral triangle in Office 365, Regular square in Office 365, Pentagon in Office 365, Hexagon in Office 365, etc.

When you create a shape in any Microsoft Office application such as Word or PowerPoint, you create a shape with proportions, which depend on the selected area to which Microsoft Office application fits a shape. For example:

Different shapes in Office 365

However, there is a way to add any of the available shapes in Microsoft 365 application (Word, Excel, PowerPoint, etc.), keeping the correct, regular proportions:

   1.   On the Insert tab, in the Illustrations group, click the Shapes button:

Word Shapes in Word 365
Excel Shapes in Excel 365
PowerPoint Shapes in PowerPoint 365

   2.   Select a shape you want to add to your document, spreadsheet or presentation, they are the same for all Microsoft 365 applications.

   3.   Holding Ctrl, click the selected shape. The shape will be added at the current cursor position with regular proportions:

Shapes with regular proportions in Office 365

Note: All shapes will be added using the default size and style. You always can change the default style for shapes.

See also this tip in French: Comment créer un triangle équilatéral, un carré et d'autres polygones réguliers.

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