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Medial Triangle
The medial triangle of a triangle
is the triangle formed by joining the midpoints
of the sides
of the triangle
Here,
is the medial triangle.
The incircle
of the medial triangle is called the Spieker circle and the incenter
is called the Spieker center.
The circumcircle
of the medial triangle is called the medial circle.
An important property of the medial triangle is that the medial triangle
of the medial triangle
of
is similar to
