Question

distance of a vertex of a triangle to its opposite base

Answer 1

Answer:

The perpendicular distance of a vertex of a triangle to its opposite base is also known as its ALTITUDE

Answer 2

The perpendicular distance between a vertex of a triangle and the side opposite that vertex. Sometime called the height of a triangle. Also, sometime the line segment itself is referred to as the altitude. for two dimensional figure, any side can be a base.