**Generally:** another word for height.

**For Triangles:** a line segment leaving at right angles from a side and going to the opposite corner.

Here are the three altitudes of a triangle:

../geometry/images/triangle.js?mode=ortho

**Generally:** another word for height.

**For Triangles:** a line segment leaving at right angles from a side and going to the opposite corner.

Here are the three altitudes of a triangle:

../geometry/images/triangle.js?mode=ortho

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