S: (n) pencil (a figure formed by a set of straight lines or light rays meeting at a point)
S: (n) conic section, conic ((geometry) a curve generated by the intersection of a plane and a circular cone)
S: (n) eccentricity ((geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis) "a circle is an ellipse with zero eccentricity"
S: (n) square, foursquare ((geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon) "you can compute the area of a square if you know the length of its sides"
S: (n) inclination, angle of inclination ((geometry) the angle formed by the x-axis and a given line (measured counterclockwise from the positive half of the x-axis))
S: (n) lemniscate (any of several plane algebraic curves in the shape of a figure eight)
S: (n) diagonal ((geometry) a straight line connecting any two vertices of a polygon that are not adjacent)
S: (v) translate (change the position of (figures or bodies) in space without rotation)
S: (v) construct (draw with suitable instruments and under specified conditions) "construct an equilateral triangle"
S: (v) inscribe (draw within a figure so as to touch in as many places as possible)
S: (v) circumscribe (to draw a geometric figure around another figure so that the two are in contact but do not intersect)