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Triangle ABC is an obtuse triangle with the obtuse angle at vertex B. Angle A must be

less than 90°.
greater than 90°.
congruent to angle B.
congruent to angle C.

Respuesta :

pineberry
Answer would be first choice, less than 90°.

The angles within a triangle add up to 180°.  If an angle is obtuse in the triangle (greater than 90°), it is impossible for the other angles to be obtuse or equal to 90°.

Hope this helps!
onyebuchinnaji

The angle A must be less than 90 degrees.

What is obtuse triangle?

  • This is a type of triangle in which one of the interior angles measures more than 90 degrees.

Since the sum of angles in a triangle add up to 180°.  If the obtuse angle is at vertex B (greater than 90°), it is impossible for the other angles to be obtuse or equal to 90°.

Thus, we can conclude that the angle A must be less than 90 degrees.

Learn more about obtuse triangles here: https://brainly.com/question/5023725

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