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User Peter Hilton
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1 Answer

21 votes
21 votes

Answer:

∠ 1 = ∠ 3 = 52°

Explanation:

∠ 3 and ∠ 6 are same- side interior angles and sum to 180° , so

∠ 3 + ∠ 6 = 180° , that is

∠ 3 + 128° = 180° ( subtract 128° from both sides )

∠ 3 = 52°

∠ 1 and ∠ 3 are vertically opposite angles and are congruent , then

∠ 1 = 52°

User Fetzig
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3.3k points