Altitutes and Orthocentre

Q. Which triangle has its altitude outside the triangle?

1. Obtuse angled triangle
2. Acute angled triangle
3. Right angled triangle
4. Equilateral triangle

Q. In which triangle does the orthocentre coincide with one of the vertex of the triangle?

1. Obtuse angled triangle
2. Right angled triangle
3. Acute angled triangle
4. Equilateral triangle

Q. How many altitudes a triangle can have?

1. One
2. Three
3. Four
4. Two

Q.

In an equilateral triangle, median and altitude through the same vertex are ___________.

Q. In the figure, IF is a the altitude intersecting side AR at F. Find FR. $\left[4\right]$