# POINT OF CONCURRENCY IN A TRIANGLE

Perpendiculars and Bisectors (Points of Concurrency) Geometry 7.2
Perpendiculars and Bisectors (Points of Concurrency) Geometry 7.2

There are four points of concurrency in a triangle.

They are

Centroid

Incenter

Circumcenter

Orthocenter

Key Concept :

A point of concurrency is the point where three or more line segments or rays intersect.

Let us discuss the above four points of concurrency in a triangle in detail.

The point of concurrency of the medians of a triangle is called the centroid of the triangle and is usually denoted by G.

The point of concurrency of the internal angle bisectors of a triangle is called the incenter of the triangle and is denoted by I.

The point of concurrency of the perpendicular bisectors of the sides of a triangle is called the circumcenter and is usually denoted by S.

The point of concurrency of the altitudes of a triangle is called the orthocenter of the triangle and is usually denoted by H.

1. Three medians can be drawn in a triangle.

2. The centroid divides a median in the ratio 2:1 from the vertex.

3. The centroid of any triangle always lie inside the triangle.

1. Three internal angle bisectors can be drawn in a triangle.

2. Each internal angle bisector will divide the vertex angle into two equal parts.

3. The incenter of any triangle always lies inside the triangle.

1. The circumcenter of an acute angled triangle lies inside the triangle.

2. The circumcenter of a right triangle is at the midpoint of its hypotenuse.

3. The circumcenter of an obtuse angled triangle lies outside the triangle.

1. Three altitudes can be drawn in a triangle.

2. The orthocenter of an acute angled triangle lies inside the triangle.

3. The orthocenter of a right triangle is the vertex of the right angle.

4. The orthocenter of an obtuse angled triangle lies outside the triangle.

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