Altitudes of a triangle. Orthocenter

1. Altitude of a triangle is:

2. Does the position of the orthocenter affect the type of triangle ? If you are not sure about the answer, change the position of the triangle's vertex in the applet above.

3. If the orthocenter is outside the triangle, what type of triangle is it ?

4. What is the position of the orthocenter in a right triangle ?

5. What is the relationship between the lenght of the side and the corresponding lenght of the altitude ?

6. If the sizes of the triangle are 5cm, 11cm and 12cm, the shortest altitude is: Use Heron's formula to calculate the area of the triangle.