Question 197065
Draw a circle.
Label a point on the circle, point A.
With the compass on A and the radius equal to that of the circle draw an arc intersecting the circle at two other points B and C.
Draw segment BC and with compass on B with radius equal to BC, draw another arc intersecting the circle at point D.
Draw BD and CD.
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Draw a circle. Keep the radius of your compass fixed! 

Starting anywhere on the circumference, mark off steps with your compass and pencil round your circle. If you do it accurately, it should fit exactly six times around.

Joining alternate points with your straight edge will give you the triangle. {Remember no measuring!}