Question

which angle in triangle def is obtuse? angle f angle d angle e

Explanation:

Step1: Recall the definition of an obtuse angle

An obtuse angle is an angle that measures greater than \( 90^{\circ} \) and less than \( 180^{\circ} \).

Step2: Analyze the angles in triangle \( DEF \)

By visual inspection of the triangle \( DEF \), angle \( F \) is the one that appears to be greater than \( 90^{\circ} \). Angles \( D \) and \( E \) are acute (less than \( 90^{\circ} \)). So, angle \( F \) is the obtuse angle in triangle \( DEF \).

Answer:

angle \( F \)