orthocenter love

# orthocenter

## Definitions

### from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The point of intersection of the three altitudes of a triangle.

### from The Century Dictionary.

• noun The cointersection point of the straight lines through the three vertexes of a triangle perpendicular to the opposite sides.

### from the GNU version of the Collaborative International Dictionary of English.

• noun (Geom.) That point in which the three perpendiculars let fall from the angles of a triangle upon the opposite sides, or the sides produced, mutually intersect.

• noun geometry : the intersection of the three lines that can be drawn flowing from the three corners of a triangle to a point along the opposite side where each line intersects that side at a 90 degree angle; in an acute triangle, it is inside the triangle; in an obtuse triangle, it is outside the triangle.

## Etymologies

Sorry, no etymologies found.

## Examples

• The first is called the orthocenter, and is the intersection of the lines from each vertex that meet the opposing sides perpendicularly, which are called the altitudes.

HERE’S LOOKING AT EUCLID

• The first is called the orthocenter, and is the intersection of the lines from each vertex that meet the opposing sides perpendicularly, which are called the altitudes.

HERE’S LOOKING AT EUCLID

• The first is called the orthocenter, and is the intersection of the lines from each vertex that meet the opposing sides perpendicularly, which are called the altitudes.

HERE’S LOOKING AT EUCLID

• In 1767 Leonhard Euler proved that for all triangles the orthocenter, the circumcenter, the centroid and the center of the midcircle are always on the same line.

HERE’S LOOKING AT EUCLID

• In 1767 Leonhard Euler proved that for all triangles the orthocenter, the circumcenter, the centroid and the center of the midcircle are always on the same line.

HERE’S LOOKING AT EUCLID

• In 1767 Leonhard Euler proved that for all triangles the orthocenter, the circumcenter, the centroid and the center of the midcircle are always on the same line.

HERE’S LOOKING AT EUCLID

• Geometric Wonders 185 C B 'A' A B C 'F Figure 5. 23b With H as the orthocenter (the point of intersection of the altitudes), M is the midpoint of CH (see Figure 5.23d).

• These nine points, for any given triangle, are • The midpoints of the sides • The feet of the altitudes • The midpoints of the segments from the orthocenter to the vertices Have your students do the necessary construction to locate each of these nine points.