For which triangle the orthocenter lies on the triangle and not inside the triangle.
Acute-angled triangle.
Obtuse-angled triangle.
Equilateral triangle
None of these
For a right-angled triangle, the orthocenter lies at one of the vertices of the triangle.
Given that in a triangle ABC, AB = 5.5 cm, BC = 5.5 cm, AC = 6 cm and ∠ABC=120∘. The given triangle is a/an ___ based on its sides and a/an ___ based on its angles.