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The concepts of altitudes and perpendicular bisectors in triangles. An altitude is a segment with one endpoint at a vertex and the other on the opposite side. A perpendicular bisector is a line or segment containing the midpoint and perpendicular to the side. In some cases, the perpendicular bisector of a side can also be an altitude.
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An altitude of a triangle is a perpendicular segment in which one endpoint is at a vertex and the other endpoint is on the side opposite that vertex. altitude
The altitude is inside the triangle The altitude is a side of the triangle The altitude is outside the triangle An altitude of a triangle may not always lie inside the triangle. acute triangle right triangle obtuse triangle Tell whether each red segment is an altitude of the triangle.
Determine whether each red line or segment is a perpendicular bisector , an altitude , or both in each triangle.