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28 July, 18:01

Triangle ABC is an abtuse triangle with the abtuse angle at vertex B. Angle A must be : less than 90 greater than 90. congruent to angle B congruent to angle C

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  1. 28 July, 18:11
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    If angle B of the triangle is obtuse, the two remaining angles, A and C, must both be acute--less than 90°. They are not necessarily congruent.

    The 1st selection is the correct one: Angle A must be less than 90°.
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