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geometry

  

CrossProduct

  

compute the cross product of two directed segments

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

CrossProduct(dseg1, dseg2)

Parameters

dseg1, dseg2

-

two directed segment

Description

• 

The cross product dseg1Xdseg2 can be interpret as the signed area of the parallelogram formed by the point 0,0, dseg1, dseg2 and dseg1+dseg2.

• 

Note that the tails of dseg1 and dseg2 must be the same.

• 

The command with(geometry,CrossProduct) allows the use of the abbreviated form of this command.

Examples

withgeometry:

pointA,0,0,pointB,1,1,pointC,11,5:

dsegmentdseg1,A,B:dsegmentdseg2,A,C:

CrossProductdseg1,dseg2

6

(1)

triangleT,A,B,C

T

(2)

areaT

3

(3)

See Also

geometry[area]

geometry[dsegment]

geometry[point]

geometry[triangle]

 


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