If triangle DEF has a 90° angle at vertex E, which statements are true? Select two options.Triangle DEF is an obtuse triangle.The angle at vertex D is acute.The angle at vertex F is obtuse.Triangle DEF is a right triangle.The angle at vertex D is obtuse.
A
Triangle DEF is an obtuse triangle.B
The angle at vertex D is acute.C
The angle at vertex F is obtuse.D
Triangle DEF is a right triangle.E
The angle at vertex D is obtuse.