Points of ConcurrencyThe point where three or more lines intersect.

Median of a TriangleA segment from one vertex of the triangle to the midpoint of the opposite side.

The intersection of the medians is called the CENTROID.How many medians does a triangle have?

Angle Bisector

The intersection of the angle bisectors is called the INCENTER.How many angle bisectors does a triangle have?

What is special about the INCENTER?Equidistant to sides of the triangle

The intersection of the perpendicular bisector is called the CIRCUMCENTER.How many perpendicular bisectors does a triangle have?

What is special about the CIRCUMCENTER?Equidistant to the vertices of the triangle.

Altitude

The intersection of the altitudes is called the ORTHOCENTER.How many altitudes does a triangle have?

Tell whether each red segment is an altitude of the triangle.The altitude is the true height of the triangle.

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