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The incentre of a triangle is the intersection of all the angle bisectors of the triangle. It is always located inside the triangle.

The centroid of a triangle is the intersection of the lines joining the midpoint of each side of the triangle with the opposite vertex. I always lies within the triangle.

The orthocenter of a triangle is the point where all three altitudes of the triangle intersect. An altitude is a line which passes through a vertex of the triangle and is perpendicular to the opposite side. The othorcenter of the triangle does not alway lie inside the triangle.

The circumcenter of a triangle is the point where the perpendicular bisectors of a triangle intersect. The circumcenter is also the center of the triangle's circumcircle - the circle that passes through all three of the triangle's vertices. The circumcentre of a triangle is not always located inside the triangle.

Therefore, for a triangle, the two points of concurrence which could be located outside the triangle are the othorcenter and the circumcenter.
BasketballEinstein

Answer:

Circumcentre and Orthocentre

Step-by-step explanation:

There is not always the circumcentre of a triangle inside the triangle. For the triangle, therefore, the othorcentre and the circumcentre are two points of rivalry which can be found outside of the triangle.

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