Question

If triangle DEF has a 90° angle at vertex E, which statements are true? Check all that apply.

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.

Answer 1

There are two statements that are true: the angle at vertx D is acute and triangle DEF is a right triangle.