# Questions about triangles and lines

• September 20th 2008, 12:06 PM
My first question, can a triangle have three angles, 0-180-0, and appear as a line segment with a point in the middle having no altitude?

Also, can a single dot on a piece of paper represent an infinite straight line in aspect to the dot being 3-d, extending through the paper?
• September 20th 2008, 12:50 PM
bkarpuz
Quote:

My first question, can a triangle have three angles, 0-180-0, and appear as a line segment with a point in the middle having no altitude?

Also, can a single dot on a piece of paper represent an infinite straight line in aspect to the dot being 3-d, extending through the paper?

up to me you are right in both ;)
but if the angles are allowed to be $0$ in your triangle definition.
• September 20th 2008, 01:35 PM
courteous
Quote:

My first question, can a triangle have three angles, 0-180-0, and appear as a line segment with a point in the middle having no altitude?

Also, can a single dot on a piece of paper represent an infinite straight line in aspect to the dot being 3-d, extending through the paper?

Deriving from both, such dot can also be a triangle.(Happy)
• September 20th 2008, 03:59 PM
masters
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