# Construction Of A Hyperbola

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An illustration showing how to construct a hyperbola by a pencil and a string. “Having given the transverse axis BC, foci f’ and f, and the vertexes A and a. Take a rule and fix it to a string at e; fix the other end of the string at the focus f. The length of the string should be such that when the rule R is in the position f’C, the loop of the string should reach to A; then move the rule on the focus f’, and a pencil at P, stretching string, will trace the hyperbola.”

### Keywords

geometry, hyperbola, geometric construction, constructions, construct, hyperbolas, hyperbola construction, hyperbola by string and pencil### Galleries

Conic Sections: Hyperbolas### Source

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

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