TriangleMeasurement
TriangleMeasurement[tri,type]
给出三角形 tri 指定类型的度量.
更多信息
- 可用 {p1,p2,p3}、Triangle[{p1,p2,p3}] 或 Polygon[{p1,p2,p3}] 给出三角形 tri.
- 可以给出以下度量类型:
-
"Area" 面积 "Circumradius" 外接圆的半径 {"Exradius",p} 顶点 p 所对的旁接圆的半径 {"ExteriorAngle",p} 顶点 p 处的外角 {"FullExteriorAngle",p} 顶点 p 处的全外角 (full exterior angle) {"Height",p} 从顶点 p 测得的三角形的高 "Inradius" 内切圆的半径 {"InteriorAngle",p} 顶点 p 的内角 "NinePointRadius" 九点圆的半径 "Perimeter" 周长 "Semiperimeter" 半周长 - 在格式 {"type",p} 中,p 可以是 GeometricScene 中的符号点规范,或者是格式 {x,y}、Point[{x,y}] 或顶点的指数 i 的明确点. 当给定短格式 "type",则使用 p2.
- 在指定顶点 p 的任何形式中,All 值会返回对应顶点的三个值列表.
- TriangleMeasurement 可与符号点一起在 GeometricScene 中使用.
范例
打开所有单元关闭所有单元范围 (11)
属性和关系 (11)
TriangleMeasurement[{a,b,c},"Area"] 等价于 Area[Triangle[{a,b,c}]]:
TriangleConstruct[{a,b,c},"Circumcircle"] 等价于 Circle[TriangleCenter[{a,b,c},"Circumcenter"],TriangleMeasurement[{a,b,c},"Circumradius"]]:
TriangleConstruct[{a,b,c},"Excircle"] 等价于 Circle[TriangleCenter[{a,b,c},"Excenter"],TriangleMeasurement[{a,b,c},"Exradius"]]:
TriangleConstruct[{a,b,c},"ExteriorAngle"] 等价于 PlanarAngle[{a,b,c},"Exterior"]:
TriangleConstruct[{a,b,c},"FullExteriorAngle"] 等价于 PlanarAngle[{a,b,c},"FullExterior"]:
TriangleMeasurement[{a,b,c},"Height"] 等价于 ArcLength[TriangleConstruct[{a,b,c},"Altitude"]]:
TriangleConstruct[{a,b,c},"Incircle"] 等价于 Circle[TriangleCenter[{a,b,c},"Incenter"],TriangleMeasurement[{a,b,c},"Inradius"]]:
TriangleConstruct[{a,b,c},"InteriorAngle"] 等价于 PlanarAngle[{a,b,c},"Interior"]:
TriangleConstruct[{a,b,c},"NinePointCircle"] 等价于 Circle[TriangleCenter[{a,b,c},"NinePointCenter"],TriangleMeasurement[{a,b,c},"NinePointRadius"]]:
TriangleConstruct[{a,b,c},"Perimeter"] 等价于 Perimeter[Triangle[{a,b,c}]]:
TriangleConstruct[{a,b,c},"Semiperimeter"] 等价于 Perimeter[Triangle[{a,b,c}]]/2:
文本
Wolfram Research (2019),TriangleMeasurement,Wolfram 语言函数,https://reference.wolfram.com/language/ref/TriangleMeasurement.html.
CMS
Wolfram 语言. 2019. "TriangleMeasurement." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/TriangleMeasurement.html.
APA
Wolfram 语言. (2019). TriangleMeasurement. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/TriangleMeasurement.html 年