Angle definition
Description for defining angles
An angle is a figure consisting of two straight lines that have the same end point. The common endpoint is the vertex of the angle.
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An angle greater than 0° but less than 90° is, is an acute angle
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An angle greater than 90° but less than 180° is an obtuse angle
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An angle of 90 ° is a right angle
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An angle of 180 ° is a straight anglel
To determine an angle measure in degrees, a protractor is used. The mathematical symbol for indicating a degree measure is °.
Angular relationships
Certain pairs of angles have special relationships with each other. These relationships are useful in determining unknown angular measurements.
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If the sum of the measurements of two angles equals 90 ° is, the angles are considered complementary
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If the sum of two angles is 180 ° is, the two angles are considered complementary
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Two angles that have a common vertex and side are adjacent angles
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