if two angles are supplementary and congruent then they are right angles

Discussion in 'Calculator Requests' started by math_celebrity, May 16, 2020.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    if two angles are supplementary and congruent then they are right angles

    Let the first angle be x. Let the second angle be y.

    Supplementary angles means their sum is 180:
    x + y = 180

    We're given both angles are congruent, meaning equal. So we set x = y:
    y + y = 180

    To solve for y, we type this equation into our search engine and we get:
    y = 90. <-- 90 degrees is a right angle, so this is TRUE
     

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