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Sure. If one of the base angles is more than 90 degrees, then the altitude (height) is outside the triangle.
Yes. This only occurs with an obtuse triangle. Because an altitude is a line drawn from a vertex to the opposite side and is perpendicular with that opposite side, it can only occur if it is outside the triangle. Look at the triangle in related links.
If you look at the vertex on the top, the only way to draw the altitude would be to draw outside the triangle.
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May an altitude of a triangle may fall outside the triangle?
yes
The lenght of one side of an equilateral triangle is 10 cm find the altitude of the triangle?
The triangle's altitude is 8.7 (8.66025) cm.
Is the altitude of an equilateral triangle equal to a side length?
No. The altitude is smaller.
What is the length of each side of an equilateral triangle when the altitude is 10?
With an altitude of 10 units, this triangle's sides each measure 11.55 (11.54701) units.
Can the altitude from the vertex angle of an isosceles triangle be the median?
If the triangle is really isosceles, and it's not lying on one of the equal sides, then the altitude is always a median.
