Answer:
Acute triangle
Explanation:
An acute triangle is one where all three angles are acute (< 90°). This triangle has all three angles 60° so it is an acute triangle
Other definitions:
Obtuse triangle is a triangle with one obtuse angle(>90°) and the other two are acute angles
Right triangle is one where one of the angles is exactly 90° and the other two angles are acute angles
All the angles of a triangle must add up to 180°