# Frequently asked questions - Draw

## How do I draw a regular equilateral triangle?

The Drawing toolbar has a button to draw an isosceles triangle but not an equilateral triangle. To draw one, you must do a little geometry. In fact, an equilateral triangle is an isosceles triangle whose height *h* is:

with *a* representing the length of any edge of the triangle.

To draw an equilateral triangle:

- click on the triangle to the right of the Basic Shapes icon to open the Basic Shapes toolbar. In the toolbar, click on the Isosceles Triangle button.

- click and drag to draw a triangle of about the size desired;
- sélect the
**Format ▸ Position and size**menu; - make sure
**Keep ratio**is unchecked; - adjust:
- the height so that it equals the width multiplied by 0.866,
- the width so that it equals the height divided by 0.866,or
- both, maintaining the proportion 0.866 between the height and the width;

- If you change the size of the triangle, click
**Keep ratio**to keep the length of the three sides equal. - Click OK.

Another way to create equilateral triangle is to:

-Draw a line, holding shift, so it is a straight line.

-Click on it, press f4 to open properties.

-Position and size, set size to 100mm.

-Click on ok

-Use copy and paste to create a copy.

-Click on it, press f4 to open properties.

-Rotation, **select bottom left** for the rotation point, and 60".

-Create another copy of the base line, click on it, press f4

-Rotation, **select bottom right** for the rotation and 300".

-Select all lines, and choose 'modify/combine' from the menu.