1. complete the following two-column proof that proves the congruent
supplements theorem.
give
given: zx and zy are supplements and zy and zz are supplements.
prove: zx = zz
pro
statements
reasons
1. zx supplement to zy
2. m/x + m2y = 180°
3. zy supplement to zz
4. mzy + mzz = 180°
5. mzx + m2y = mzy + mzz
6. m2x = mzz
7. zxzz

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

Which expression is equivalent to (4 +6i)^2? ? -20 + 48i 8 + 12i 16 - 36i 20 + 48i

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality