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12 September, 19:35

A quadrilateral has two right angles. The measure of the third angle is 73°.

What is the measure of the fourth angle?

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Answers (2)
  1. 12 September, 21:00
    0
    The sum of the quadrilateral should be 360 degrees.

    We have 3 angle measures given; two ninety degree angles, and one 73 degree angle.

    90+90+73 = 253

    Then 360-253 = 107

    Therefore, the measure of the fourth angle is 107 degrees
  2. 12 September, 22:39
    0
    360 - (90 + 90 + 73)

    360 - 253

    = 107 degrees

    to check if the answer is correct, add the numbers together, if it equals 360, then it is right.

    so, 90 + 90 + 73 + 107

    =360 degrees
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