Chapter 4 Review - Congruent Triangles

Front

What is a median of a triangle?

Back

A segment with endpoints at the vertex and midpoint of the opposite side.

Front

What is the point of concurrency called where the angle bisectors of a triangle meet?

Back

Incenter.

Front

If G is the centroid of triangle ABC and BE= 18, what is the length of BG?

Back

12.

Front

What property is used when two triangles share a common side in a proof?

Back

Reflexive Property.

Front

What additional information is required for two triangles to be congruent by SAS?

Back

The length of one side.

Front

What does SAS stand for in triangle congruence?

Back

Side-Angle-Side.

Front

What is the centroid of a triangle?

Back

The point where the three medians intersect.

Front

What is the circumcenter of a triangle?

Back

The point where the perpendicular bisectors of the sides intersect.

Front

What is the orthocenter of a triangle?

Back

The point where the altitudes of the triangle intersect.

Front

What is the significance of vertical angles in triangle congruence?

Back

Vertical angles are congruent and can be used in proofs.