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Statements

Subject Item
dbr:Tri-oval
rdf:type
yago:WikicatGeometricShapes yago:Attribute100024264 yago:Abstraction100002137 yago:Shape105064037 yago:SpatialProperty105062748 dbo:Album yago:Property104916342
rdfs:label
三-椭圆形 Tri-oval
rdfs:comment
三-椭圆形（Tri-oval）是从两个形状（三角形和椭圆形）混合而成的。和三角形比較，三-椭圆形没有角，三-椭圆形把三角形的三个角各自换成曲线。 相对于椭圆形的四个转弯，三-椭圆形则有六个转弯。根据四頂點定理，每个簡單閉曲線至少有四个顶点（其曲率达到局部最小值或是最大值的點）。在三-椭圆形中，有六个顶点，會是三个局部最小点和三个局部最大点，輪流交错出現。 A tri-oval is a shape which derives its name from the two other shapes it most resembles, a triangle and an oval. Rather than meeting at sharp, definable angles as the sides of a triangle do, in a tri-oval these angles are instead rounded into smooth curves. While an oval has four turns, a tri-oval has six. More formally, according to the four-vertex theorem, every smooth simple closed curve has at least four vertices, points where its curvature reaches a local minimum or maximum. In a tri-oval, there are six such points, alternating between three minima and three maxima.
foaf:depiction
n12:Phakisa_Freeway_-_Speedway.svg n12:Trióvalo_Bernardo_Obregón.png n12:Sanair_Super_Speedway_map.svg n12:TalladegaSuperspeedway2-2.jpg n12:Trioval.svg n12:Talladega_Superspeedway.png n12:Kentucky_Speedway.png n12:Pocono_Raceway.svg n12:Daytona_International_Speedway.svg n12:Chicagoland_Speedway.png n12:Nashville_Superspeedway.png n12:EuroSpeedway_Lausitz_tri-oval_diagram.svg n12:Walt_Disney_World_Speedway_diagram.svg n12:KansasSpeedway_all.png n12:Las_Vegas_Motor_Speedway.png
dcterms:subject
dbc:Geometric_shapes
dbo:wikiPageID
685613
dbo:wikiPageRevisionID
1083932633
dbo:wikiPageWikiLink
n4:TalladegaSuperspeedway2-2.jpg dbr:Pocono_Raceway dbr:Chicagoland_Speedway n4:Chicagoland_Speedway.PNG dbr:Las_Vegas_Motor_Speedway dbr:Kansas_Speedway dbr:Walt_Disney_World_Speedway dbr:Racetrack dbr:Nashville_Superspeedway dbr:Daytona_International_Speedway dbr:Bean_curve n4:Walt_Disney_World_Speedway_diagram.svg dbc:Geometric_shapes dbr:Phakisa_Freeway dbr:Talladega_Superspeedway dbr:Curvature dbr:Oval_(geometry) dbr:Triangle dbr:Trióvalo_Bernardo_Obregón dbr:EuroSpeedway_Lausitz n4:Kentucky_Speedway.PNG n4:Trioval.svg dbr:Simple_closed_curve n4:EuroSpeedway_Lausitz_tri-oval_diagram.svg n4:Phakisa_Freeway_-_Speedway.svg n4:Daytona_International_Speedway.svg n4:KansasSpeedway_all.PNG dbr:Vertex_(curve) dbr:N-ellipse dbr:Four-vertex_theorem n4:Las_Vegas_Motor_Speedway.PNG dbr:Reuleaux_triangle n4:Talladega_Superspeedway.png dbr:Kentucky_Speedway dbr:Bill_France_Sr. n4:Nashville_Superspeedway.png n4:Sanair_Super_Speedway_map.svg dbr:Sanair_Super_Speedway dbr:Indianapolis_Motor_Speedway n4:Trióvalo_Bernardo_Obregón.png n4:Pocono_Raceway.svg
owl:sameAs
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dbp:wikiPageUsesTemplate
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dbo:thumbnail
n12:Trioval.svg?width=300
dbo:abstract
三-椭圆形（Tri-oval）是从两个形状（三角形和椭圆形）混合而成的。和三角形比較，三-椭圆形没有角，三-椭圆形把三角形的三个角各自换成曲线。 相对于椭圆形的四个转弯，三-椭圆形则有六个转弯。根据四頂點定理，每个簡單閉曲線至少有四个顶点（其曲率达到局部最小值或是最大值的點）。在三-椭圆形中，有六个顶点，會是三个局部最小点和三个局部最大点，輪流交错出現。 A tri-oval is a shape which derives its name from the two other shapes it most resembles, a triangle and an oval. Rather than meeting at sharp, definable angles as the sides of a triangle do, in a tri-oval these angles are instead rounded into smooth curves. While an oval has four turns, a tri-oval has six. More formally, according to the four-vertex theorem, every smooth simple closed curve has at least four vertices, points where its curvature reaches a local minimum or maximum. In a tri-oval, there are six such points, alternating between three minima and three maxima.
gold:hypernym
dbr:Shape
prov:wasDerivedFrom
wikipedia-en:Tri-oval?oldid=1083932633&ns=0
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3485
foaf:isPrimaryTopicOf
wikipedia-en:Tri-oval