The triangle formed by the points of pairwise intersection of the three intangents. It is not in perspective with .
It has trilinear vertex matrix
(1)
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or
(2)
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(Kimberling 1998, p. 161).
It has side lengths
(3)
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(4)
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(5)
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where is the inradius of the reference triangle, is its semiperimeter, and is its circumradius. It has area
(6)
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(7)
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where is the area of .
The intangents circle is the circumcircle of the intangents triangle.