Ch.5 Flashcard Review and Section 5-4

Front

What is an angle bisector?

Back

An angle bisector is a line or ray that divides an angle into two equal parts.

Front

What is the second step of an indirect proof?

Back

The second step of an indirect proof is to reason until you find a contradiction to a known fact.

Front

Find LK if LK = 3.

Back

LK = 3.

Front

What is the circumcenter of a triangle?

Back

The circumcenter of a triangle is the point where the perpendicular bisectors of the sides intersect, and it is equidistant from the vertices of the triangle.

Front

What do the perpendicular bisectors of a triangle meet at?

Back

The perpendicular bisectors of a triangle meet at the circumcenter.

Front

What is a perpendicular bisector?

Back

A perpendicular bisector is a line that divides a segment into two equal parts at a 90-degree angle.

Front

What is a median in a triangle?

Back

A median is a line segment that connects a vertex of a triangle to the midpoint of the opposite side.

Front

What is an altitude in a triangle?

Back

An altitude is a perpendicular segment from a vertex to the line containing the opposite side.

Front

What is a midsegment in a triangle?

Back

A midsegment is a segment that connects the midpoints of two sides of a triangle.

Front

How do you find the circumcenter of a triangle?

Back

To find the circumcenter, construct the perpendicular bisectors of at least two sides of the triangle; their intersection is the circumcenter.