Definition: You will be given a passage, and your task is to generate a Yes/No question that is answerable based on the given passage.
Input: An acute triangle is a triangle with all three angles acute (less than 90°). An obtuse triangle is one with one obtuse angle (greater than 90°) and two acute angles. Since a triangle's angles must sum to 180°, no triangle can have more than one obtuse angle.

do all triangles have at least two acute angles?