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geometry

  

incircle

  

find the incircle of a given triangle

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

incircle(ic,T, 'centername'=cn)

Parameters

T

-

triangle

ic

-

the name of the incircle

'centername'=cn

-

(optional) where cn is a name denoting the center of the incircle ic

Description

• 

The incircle ic of triangle T is the circle inscribed inside the triangle.

• 

If the optional argument is given and is of the form 'centername' = cn where cn is name, cn will be the name of the center of ic.

• 

For a detailed description of the incircle ic, use the routine detail (i.e., detail(ic))

• 

Note that the routine only works if the vertices of the triangle are known.

Examples

withgeometry:

triangleT,pointA,0,0,pointB,2,0,pointC,1,3:

incircleinc,T,'centername'=o

inc

(1)

detailinc

assume that the names of the horizontal and vertical axes are _x and _y, respectively

name of the objectincform of the objectcircle2dname of the centerocoordinates of the center1,310+1radius of the circle310+1equation of the circle1+_x2+_y22_x6_y10+1=0

(2)

See Also

geometry[bisector]

geometry[circle]

geometry[draw]

geometry[excircle]

geometry[triangle]

 


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