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# How do you determine if two angles are supplementary?

To determine if two angles are supplementary, first take their degree measurements using a protractor. Then, add the two figures. If their sum equals 180 degrees (the measurement of a straight line), then they are considered supplementary angles.

Continue ReadingThough angles do not have to be adjacent to be supplementary, because supplementary angles pair to make straight lines, they can be used to find the measurements of unknown, adjacent angles. Care must be taken, however, not to confuse their properties with those of complementary angles, which are closely related but pair to make right angles and add up to 90 degrees.

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## How do you prove the complementary angle theorem?

A: The first theorem used to prove that two angles are complementary states that if two angles are complementary to a third angle, then they are typically con... Full Answer >Filed Under: -
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## How do you read a protractor?

A: A protractor is an inexpensive math tool used to measure the sharpness of an angle in a geometric shape. Reading a protractor is fairly simple. Full Answer >Filed Under: -
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## How do you measure angles?

A: Use a protractor to measure the number of degrees in an angle. Place the protractor over the angle so that one line goes along the protractor's zero degree... Full Answer >Filed Under: -
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## How do you make a protractor with a printout?

A: To make a printable protractor, you need Internet access, a computer, a printer, durable printer paper or cardstock, and a pair of scissors. The process ta... Full Answer >Filed Under: