Parallel lines are crossed by a secant. The one-sided angle difference is 40 degrees. What are these angles equal to?
| May 9, 2021 | education
When intersecting a secant of parallel straight lines, the sum of one-sided angles is 180 degrees. We need to check the proposed options so that the sum of the numbers is 180, and the difference is modulo 40.
1.120 + 80 = 200; 120 – 80 = 40. No.
2.150 + 110 = 260; 150 – 110 = 40. No.
3.110 + 70 = 180; 110 – 70 = 40. Yes.
4.100 + 60 = 160; 100 – 60 = 40. No.
Answer: option 3.110 and 70.
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