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How can you use a protractor to prove that AB and DC are perpendicular?

How can you use a protractor to prove that AB and DC are perpendicular?
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5 votes
How can you use a protractor to prove that AB and DC are perpendicular?

How can you use a protractor to prove that AB and DC are perpendicular?-example-1
User Alexandre Abreu
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7.7k points

1 Answer

4 votes
because they create 90° angles
User Lloyd Keijzer
by
9.1k points
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