Question

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.

Answer 1

Edge An absolute necessity be under 90 if ABC is an unfeeling triangle. When you include the measures of every one of the three points in a triangle, they generally signify 180 degrees.

It doesn't make a difference how huge or little the triangle is, or how thin or fat it is. It's a triangle thing. The points dependably indicate 180 degrees.