G.1.4.3 Spot the Equilaterals

Topic:
Geometry
Here is a straightedge and compass construction of a regular hexagon inscribed in a circle just before the last step of drawing the sides:

Use straightedge and compass moves to construct at least 2 equilateral triangles of different sizes. Hint - start by recreating the drawing above.

How do you that the triangles you made are equilateral?