| 单词 | plane figure |
| 释义 | plane figure (once / 127090 pages) n WORD FAMILY plane figure: plane figures USAGE EXAMPLESThe time was the late 16th and 17th centuries, and the mathematics in question was the proper understanding of continua — straight lines, plane figures, solids. New York Times(Apr 07, 2014) Proclus remarked that the semicircle is the only plane figure that has its center on its perimeter. Smith, David Eugene, The Teaching of Geometry(2011) Thus, to one plane figure we can construct one reciprocal figure in the plane, and to each one reciprocal figure in a pencil. Various, Encyclopaedia Britannica, 11th Edit...(2011) n a two-dimensional shape Syn|Hypo|Hyper two-dimensional figure heart a plane figure with rounded sides curving inward at the top and intersecting at the bottom; conventionally used on playing cards and valentines polygon, polygonal shapea closed plane figure bounded by straight sides conic, conic section(geometry) a curve generated by the intersection of a plane and a circular cone oblonga plane figure that deviates from a square or circle due to elongation hemicycle, semicirclea plane figure with the shape of half a circle sectora plane figure bounded by two radii and the included arc of a circle stara plane figure with 5 or more points; often used as an emblem paraboloida surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis ellipsoida surface whose plane sections are all ellipses or circles tree, tree diagrama figure that branches from a single root isogonan equiangular polygon convex polygona polygon such that no side extended cuts any other side or vertex; it can be cut by a straight line in at most two points concave polygona polygon such that there is a straight line that cuts it in four or more points ellipse, ovala closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it quadrangle, quadrilateral, tetragona four-sided polygon triangle, trigon, trilaterala three-sided polygon hexagrama regular polygon formed by extending each of the sides of a regular hexagon to form two equilateral triangles asterism(mineralogy) a star-shaped figure with six rays that is seen in some crystal structures under reflected or transmitted light pentacle, pentagram, pentanglea star with 5 points; formed by 5 straight lines between the vertices of a pentagon and enclosing another pentagon pentagona five-sided polygon hexagona six-sided polygon heptagona seven-sided polygon octagonan eight-sided polygon nonagona nine-sided polygon decagona polygon with 10 sides and 10 angles undecagonan eleven-sided polygon dodecagona twelve-sided polygon spherical polygona figure on the surface of a sphere bounded by arcs of 3 or more great circles parabolaa plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the curve hyperbolaan open curve formed by a plane that cuts the base of a right circular cone cladograma tree diagram used to illustrate phylogenetic relationships stemmaa tree diagram showing a reconstruction of the transmission of manuscripts of a literary work figure a combination of points and lines and planes that form a visible palpable shape |
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