The centroid is the common intersection of the three medians. A median of a triangle is the segment from a vertex to the midpoint of the opposite side
The circumcircle is the circumscribed circle of the triangle.
The incenter of a triangle is the point on the interior of the triangle that is equidistant from the three sides.
The incircle is the
inscribed circle of the triangle.
Medial trianglePedal triangle, given a triangle and pedal point P
Square, given a side
Isosceles triangle, given base
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