Question

Determine which one of the following figure is an orthocenter of an obtuse angled triangle?

• A. figure 3
• B. figure 4
• C. figure 1
• D. figure 2

Answer 1

The correct option is C figure 1

For an obtuse angled triangle the orthocenter lies outside the triangle.
So, the figure 1 shows that the orthocenter of an obtuse angled triangle lies outside on the point $O$.