Altitudes in Triangles

Finding an Altitude

1) Find the Perpendicular line tool[br]2) Click on a side of the triangle and then click on it's OPPOSITE vertex. [br]3) Perform this task on each of the 3 sides of the triangle. [br]4) What do you notice about all 3 Altitudes?

Altitudes

This point at which each altitude intersects is called the Orthocenter

Now move point A so that it is an Obtuse Triangle, and then a Right Triangle. What do you notice about the Orthocenter? How does it move?

Where is the Orthocenter located on a right triangle?

On the vertex of the right angle Inside the triangle On the hypotenuse Outside the center

Information: Altitudes in Triangles