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168 Geometry
point2d
Randomly re-distributes a set of points such that, for each
point, x ∈ [–5,5] and y ∈ [–5,5]. Any further movement of
one of the points will randomly re-distribute all of the points
with each tap or direction key press.
point2d(point1, point2, …, pointn)
trace
Begins tracing of a specified point.
trace(point)
stop trace
Stops tracing of a specified point, but does not erase the
current trace. This command is only available in Plot view. In
Symbolic view, uncheck the trace object to erase the trace and
stop further tracing
erase trace
Erases the trace of a point, but does not stop tracing. Any
further movement of the point will be traced. In Symbolic view,
uncheck the trace object to erase the trace and stop further
tracing.
Line
DrawSlp
Given three real numbers m, a, b, draws a line with slope m
that passes through the point (a, b).
DrawSlp(a,b,m)
Example: DrawSlp(2,1,3) draws the line given by
y=3x–5
altitude
Given three non-collinear points, draws the altitude of the
triangle defined by the three points that passes through the
first point. The triangle does not have to be drawn.
altitude(point1, point2, point3)
Example: altitude(A, B, C) draws a line passing
through point A that is perpendicular to BC.