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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Ответ:

shookie1993

23.12.2022

Mathematics

9z + 10 = 1 - 3(5 - 3z) use distributive property

9z + 10 = 1 + (-3)(5) + (-3)(-3z)

9z + 10 = 1 - 15 + 9z

9z + 10 = -14 + 9z subtract 9z from both sides

10 = -14 FALSE

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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.