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Triangle ABC is an obtuse triangle with the obtuse angle at vertex B. Angle A must be A) less than 90°. B) greater than 90°. C) congruent to angle B. D) congruent to angle C.

Craig Stewart

in Mathematics

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1 answer

Whitney Matthews on February 3, 2018

We have to find the correct expression for the angle in a triangle ABC, that is an obtuse triangle. We know that angle B is obtuse ( greater of 90 degrees ). Therefore, the angles a and C must be less than 90 degrees. The angle cannot be congruent to angle B ( angle B > angle A ). Can be congruent to angle C, but in the case that the ABC is a isosceles obtuse triangle. Answer: the Angle must be a ) less than 90 degrees.

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