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Why an angle that is supplementary to an acute angle must be an obtuse angle

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Because the acute angle is less than 90 degrees, the supplimentary angle must be greater than 90 degrees for them to add up to 180.
User Meenaparam
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because an acute angle is less than 90 and supplementary angles must equal 180 so the other angle must be obtuse

User Brandonhilkert
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