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| 1 | Polygon |
| 1 | Triangle |
| 1 | Point |
| 1 | Basic Polygon |
| 2 | Perpendicularity In Euclidean Plane |
| 2 | Ordered Geometry |
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Pedal Triangle
The pedal triangle of any triangle
,
is the triangle whose vertices
are the feet of perpendiculars
from
, 
and 
to their opposite sides
in
.
In this figure, the
is the pedal triangle
of
.
In general, for any point
inside a triangle, the pedal triangle of is a triangle whose vertices are the
feet of perpendiculars from to the sides
of the triangle.
In the following figure, the
is the pedal
triangle of in
.
