In triangle RST, m∠R > m∠S + m∠T. Which must be true of triangle RST? Check all that apply.m∠R > 90°m∠S + m∠T m∠Tm∠R > m∠S m∠S > m∠T

The angles in a triangle add to 180°, so m∠S + m∠T = 180° − m∠R. Since m∠R is greater than m∠S + m∠T, it must be greater than half of 180°, or 90°; this gives A. Also, m∠S + m∠T is less than 90°, giving B. Because both other angles are positive, their sum is greater than either one individually, so m∠R is greater than both m∠S and m∠T, giving D and E.

AI-written and checked against the verified answer.