Mathematics, 18.09.2019 21:30, tabithacat3536

Given: line bc is parallel to line ed
m∠abc = 70°
m∠ced = 30°
prove: m∠bec = 40°
statement justification
line bc is parallel to line ed given
m∠abc = 70° given
m∠ced = 30° given
m∠abc = m∠bed corresponding angles theorem
m∠bec + 30° = 70° substitution property of equality
m∠bec = 40° subtraction property of equality
which of the following accurately completes the missing statement and justification of the two-column proof?
m∠bec + m∠ced = m∠bed; definition of a linear pair
m∠abc + m∠bec = m∠bed; angle addition postulate
m∠abc + m∠bec = m∠bed; definition of a linear pair
m∠bec + m∠ced = m∠bed; angle addition postulate

Given: line bc is parallel to line ed m∠abc = 70° m∠ced = 30° prove: m∠bec

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Given: line bc is parallel to line ed
m∠abc = 70°
m∠ced = 30°
prove: m∠bec = 40°<...