Calculate Angle α: Parallel Lines with 100° Intersection Problem

a and b are parallel lines.

Calculate the size of angle α \alpha .

aaabbb100α

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Step-by-step video solution

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00:06 Let's find angle A.
00:13 We know the lines are parallel. Nice!
00:18 Remember, corresponding angles in parallel lines are equal.
00:28 Also, vertical angles are equal.
00:32 And that's how we solve this question!

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1

Understand the problem

a and b are parallel lines.

Calculate the size of angle α \alpha .

aaabbb100α

3

Final Answer

100 100

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Does the diagram show an adjacent angle?

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