Question

Decide whether the statement is always, sometimes, or never true.
The vertex of an isosceles triangle is acute

Answer 1

The vertex of an isosceles triangle is sometimes acute. If the other two angles add up to be greater than 90 degrees, then it is acute. If the other two angles add up to exactly 90 degrees, then it is a right triangle. If the other two angles add up to less than 90 degrees, then it is obtuse.