We have the following triangle:
And we need to find the figure which is the perpendicular bisector of the triangle ABC.
1. To find the perpendicular bisector, we need to remember that a perpendicular bisector of a triangle has two properties (at least):
• It divides one of the sides of the triangle into two congruent parts.
,
• It forms an angle of 90 degrees (or a right angle) to the side it divides into two congruent parts.
2. Then if we see the triangle ABC we can determine that:
3. Therefore, we have the figure which is a perpendicular bisector of triangle ABC is the side (or segment) AD.
Hence, in summary, the figure which is a perpendicular bisector of triangle ABC is the side (or segment) AD (last option).
