Definitions [2]
Definition: Altitude
An altitude of a triangle is a straight line from one vertex, drawn perpendicular (at 90°) to the opposite side (or to its extension)
- Orthocentre: The altitudes of a triangle pass through exactly one point; that means they are concurrent. The point of concurrence is called the orthocentre.
Definition: Median
The line segment joining a vertex of a triangle to the midpoint of its opposite side is called a median of the triangle.
- The point where all three medians meet is called the centroid.
