Complementary AnglesIf two angles are complementary, can one of them be obtuse? Why?

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marilynn07 | High School Teacher | (Level 3) Associate Educator

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Complementary angles are two angles that add up to 90 degrees.


If you have a 40 degree angle and a 50 degree angle, their measure is 90 degrees.


An obtuse angle cannot be a complementary angle because an obtuse angle measures more than 90 degrees.

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Jyotsana | Student, Grade 10 | (Level 1) Valedictorian

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One of the angles cannot be obtuse from the complementary angle because complementary angles add up to 90 degree but obtuse angle have more than 90 degree so one of the angles cannot be complementary.

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sammykav123 | Student, Grade 9 | eNotes Newbie

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No a complementary angle cannot have an obtuse angle because a complementary angle is two angles together that ad up to 90 degrees and an obtuse angle is more than 90 degrees.

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chevykrish | Student, Grade 10 | eNotes Newbie

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complementary means the sum of 2 angles is equal to 90.If i angle is obtuse then their is no other angle formed.therefore one angle cannot be obtuse.