What does supplementary angles mean , please explain and give an example thanks?

10 Answers

  • 1 decade ago
    Favourite answer

    2 angles that add up to 180 degrees. Ex: 130 and 50

  • Supplementary angles are any 2 angles that add up to 180 degrees

    For instance, 90 degrees is it's own supplementary angle (90 + 90 = 180)

    45 degrees has a supplementary angle of 135 degrees (45 + 135 = 180)

    And so on and so forth

  • 4 years ago

    What Does Supplementary Angles Mean

  • Anonymous
    1 decade ago

    Supplementary Angles are a pair of angles that add up do 180 degrees. For Ex. 120 degree angle plus an 60 degree angle are a pair of supplementary angles.

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  • 1 decade ago

    Two angles are Supplementary if they add up to 180 degrees.

    Example: 60° and 120° are supplementary angles

  • Anonymous
    1 decade ago

    Hey sexy ??? ,

    Two angles are supplementary if the sum of their angles equals 180 degrees.

    If one angle is known, its supplementary angle can be found by subtracting the measure of its angle from 180 degree.

    Example: What is the supplementary angle of 143 deg?

    Solution: 180° - 143 ° = 37 °



    Antwerp, Belgium

  • 1 decade ago

    ok sexy, supplementary angles are two angles that up to 180 degrees.

    say you have a straight line that has a line intersecting at a point that makes an angle of 75 degrees. the supplementary angle would be 105 degrees because 75+105=180.

  • Olga
    Lv 4
    5 years ago

    Complementary angles mean that they add to 90 degrees. If the sum of all the angles in a triangle is always equal to 180 degrees, then that means that the two complementary angles are less than 90, meaning they are acute. The other angle is either equal to 90 degrees, or less than 90 degrees. This means that the triangle could either be acute or a right triangle. since only two of the angles in the second triangle add up to 180 degrees, the third one must be zero. This means the triangle cannot exist.

  • 5 years ago

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  • 1 decade ago

    i'm absolutely SURE that your book has this in it. If you can't find it, try looking it up in the index.

    Source(s): common sense
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