Lines a, b and c are intersected by the line d, ∠1 = 42 °, ∠2 = 140 °, ∠3 = 138 °. Which of the lines a, b and c are parallel?
| December 1, 2020 | education
Lines a and c are parallel, so the angle 1 + angle 3 in total form 180 degrees. These are one-sided angles with parallel lines a and c and secant d.
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