Aristar Aristar

25-10-2019
Mathematics

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gcantiga44 gcantiga44

25-10-2019

Answer:

m∠2 = 90°

Step-by-step explanation:

Here's a postulate:

If a line is perpendicular to another line, then they make up 90° on both sides.

OR

If a⊥b, then ∠ are 90°

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