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geom3d[triangle] - define a triangle
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Calling Sequence
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triangle(T, [A, B, C], n)
triangle(T, [l1, l2, l3], n)
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Parameters
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T
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the name of the triangle
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A, B, C
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three points
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l1, l2, l3
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three lines
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n
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(optional) list of three names representing the names of the x-axis, y-axis and the z-axis respectively.
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Description
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A triangle is a polygon having three sides. A vertex of a triangle is a point at which two of the sides meet.
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A triangle T can be defined as follows:
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from three given points A, B, C.
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–
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from three given lines l1, l2, l3.
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To access the information relating to a triangle T, use the following function calls:
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form(T)
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returns the form of the geometric object (i.e., triangle3d if T is a triangle).
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DefinedAs(T)
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returns the list of three vertices of T
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detail(T)
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returns a detailed description of the triangle T.
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The command with(geom3d,triangle) allows the use of the abbreviated form of this command.
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Examples
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>
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define three points  , and 
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define the triangle  that has  as its vertices
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![triangle(T1, [A, B, C])](/support/helpjp/helpview.aspx?si=5919/file04039/math164.png)
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| (1) |
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>
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| (2) |
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![[[0, 0, 0], [1, 1, 1], [1, 0, 2]]](/support/helpjp/helpview.aspx?si=5919/file04039/math181.png)
| (3) |
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Download Help Document
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