
Ray
Tap where you want the endpoint to be and press . Tap a point that you want the ray to pass
through and press
. A ray is drawn from the rst point and through the second point.
Line
Tap a point you want the line to pass through and press . Tap another point you want the line to
pass through and press
. A line is drawn through the two points.
Keyboard shortcut:
Tap a third point (C) and press . A line is drawn through A bisecting the angle formed by line AB
and line AC.
Parallel
Tap on a point (P) and press . Tap on a line (L) and press . A new line is draw parallel
to
L and passing through P.
Perpendicular
Tap on a point (P) and press . Tap on a line (L) and press . A new line is draw
perpendicular to
L and passing through P.
Tangent
Tap on a curve (C) and press . Tap on a point (P) and press . If the point (P) is on the
curve (C), then a single tangent is drawn. If the point (P) is not on the curve (C), then zero or more tangents
may be drawn.
Median
Tap on a point (A) and press . Tap on a segment and press . A line is drawn through
the point (A) and the midpoint of the segment.
Altitude
Tap on a point (A) and press . Tap on a segment and press . A line is drawn through
the point (A) perpendicular to the segment (or its extension).
172 Chapter 9 Geometry
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