Hart, C. A. (Clara Avis), b. 1863, Feldman, Daniel D., b. 1872 · New York, American Book Co · leaf 402
e? of a right circular cone ? Explain. Ex. 1376. Find the locus of all straight lines making a given anglewith a given straii^^ht line, at a given point in the line. What will thislocus be if the given angle is 90° ? Ex. 1377. Find the locus of all straight lines making a given anglewith a given… … Given CD a section of cone V-AB made by a plane II base AB.To prove section CD a O. Outline of Proof 1. Let It and S be any two points on the boundary of sectionCD; pass planes through OV and points R and S, 2. Prove A VOM ~ A VPR and A VON ~ A VPS. OM ON o rr\. OM VO .ON VO o. Ihen — = — and —■ =…
Geometry, Plane · Geometry, Solid
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