# Construction Of An Equilateral Triangle Inscribed In A Circle

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An illustration showing how to construct an equilateral triangle inscribed in a circle. “With the radius of the circle and center C draw the arc DFE; with the same radius, and D and E as centers, set off the points A and B. Join A and B, B and C, C and A, which will be the required triangle.”

### Keywords

geometry, circle, circles, radius, tangent, center, Circumference, geometric construction, equilateral triangle, construct, triangle inscribed in circle### Galleries

Geometric Constructions### Source

Albert A. Hopkins *Scientific America: Handy Book Of Facts And Formulas* (New York: Munn & Co., Inc., 1918) 37

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