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What is the definition of an angle bisector?

A line that divides an angle into two equal partsA line that intersects an angle at its vertexA line that forms a right angle with the opposite sideA line that extends from the midpoint of one side to the opposite vertex

In triangle ABC, if the angle bisector of angle A meets side BC at D, which statement is true about segments BD and DC?

BD = DCThe ratio of BD to DC equals the ratio of the sides opposite those anglesBD is twice as long as DCBD and DC have no relationship

Which of the following types of triangles has angle bisectors that are also altitudes?

Scalene triangleIsosceles triangleEquilateral triangleRight triangle

Assessment

What is the definition of an angle bisector?

In triangle ABC, if the angle bisector of angle A meets side BC at D, which statement is true about segments BD and DC?

Which of the following types of triangles has angle bisectors that are also altitudes?