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### Common terms and phrases

4th quadrant Analysis Assume auxiliary plane axis of revolution bisector brilliant point Construction cuts cylinder Descriptive Geometry determined draw drawn thru ellipse ellipsoid ﬁgure ﬁnd the perspective ﬁnding ﬁrst given angle given cone given curve given line given point pass given surface H piercing H plane H projection H trace hence inﬁnite distance inﬁnity intersecting lines line of inter line of intersection line of shadow line parallel line thru located object parallel to H pass a plane pendicular perpendicular to H picture plane piercing point plane perpendicular plane tangent plane thru point point of sight problem Proﬁle plane projecting lines QUIZ SHEET radius Reqd required line required perspective revolved position Revolving plane rhombus right circular cone right line right section ruled surfaces shadow ray sphere surface of revolution thru the apex Thru the given thru the point true length vanishing point vertical visual ray