When the sum of the measures of two angles is 180°, the angles are called________.

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Supplementary angles

Vertically opposite angles

Adjacent angles

Complementary angles

answer is B.

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Detailed Solution

If the sums of two angles are 180° the angles are called Supplementary angles.

For example,

In the given figure, the measure of angle AOB is 150^o and that of angle AOC is 30^o. The sum of the measure of both angles is 150^o + 30^o. = 180^o. So these angles are called supplementary angles.

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