04+Altitudes


 * Altitudes**

Summary: In a triangle, an altitude is the distance between the vertex and the base in a triangle. The line created is perpendicular to the base. There are 3 possible altitudes in a triangle. If you have the three altitudes from the three vertices, the lines will meet at a point called the orthocenter. In an acute triangle, the orthocenter lies inside the triangle. In a obtuse triangle, the orthocenter lies outside the triangle. The orthocenter of a right triangle is the corner of the right angle. __Examples__

Acute Triangle:

orthocenter is in the triangle

Right Triangle:

orthocenter is the corner of the right angle

Obtuse Triangle:

Links: 1.) http://www.icoachmath.com/sitemap/altitude_of_a_triangle.html 2.) http://www.homeschoolmath.net/teaching/g/altitude.php 3.) [] 4.) http://www.vias.org/comp_geometry/geom_triangle_altitude.html