Mathematics, 26.07.2019 03:30 zurfluhe

If triangle def has a 90° angle at vertex e, which statements are true?
(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.

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If triangle def has a 90° angle at vertex e, which statements are true?
(a) triangle def is...