Where can the lines containing the altitudes of an obtuse triangle intersect.

The lines containing the altitudes of an obtuse triangle intersect at a point which lies outside the triangle called orthocenter.

Explanation:-

A line which passes through a vertex of the triangle and is perpendicular to the opposite side is called an altitude of the triangle.

The point where all three altitudes of the triangle intersect is called its orthocenter .

395.84

step-by-step explanation:

2πrh+2πr²

2 (pie)(radius)(height)+2(pie)(radius)^2