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.

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.

welshfella · Answer

tis is a right angled triangle whose other 2 angles add up to 90 degrees.

welshfella · Answer

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samirahdanyel · Answer

the other two angles add up to 180?