Triangle ABC is an obtuse triangle with an obtuse angle at vertex B. T

1.	Triangle ABC is an obtuse triangle with an obtuse angle at vertex B. Then angle a must be ___.
Answer» IfΔABC is an obtuse triangle with an obtuse angle at vertex B, then∠A must be an acute angle. A triangle is a closed figure orshapewith 3 sides, 3angles,and 3 vertices.

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