Question 1: Which two statements contradict each other?

A. triangle ABC is scalene

B. Triangle ABC is isosceles

C. Triangle ABC is right

D. Triangle ABC is acute

Answer choices: A and B, A and D, B and C, B and D

Question 2: Which two statements contradict each other?

I. triangle LMN is such that angle L is obtuse

II. triangle LMN is such that angle M is acute

III. triangle LMN is such that angle N is obtuse

IV. triangle LMN is an obtuse angle

Answer choices: I and II, I and III, II and III, II and IV

Question 3: In the proof below, what can be filled in for the blanks labeled b?

Developing Proof Fill in the blanks to prove the following statement: In right AABC, myB + mzC = 90. Given: right AABC Prove: m/B + mZC = 90 A C Assume temporarily that m/B + mzC a. . If m/B + mzC a. then mZA + m/B + mzc b. . According to the Triangle Angle-Sum Theorem, mZA + m/B + mZC = _ C. . This contradicts the previous statement, so the temporary assumption is d. Therefore, m_B + mZC = 90.\f