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24 January, 05:55

The measure of an angle is 51°.

What is the measure of its supplement?

A.

39°

B.

49°

C.

129°

D.

139°

+1
Answers (2)
  1. 24 January, 07:30
    0
    Supplement of an angle is what must be added to that angle to get 180

    51+supplement=180

    minus 51 both sides

    supplement=129

    answer is C
  2. 24 January, 09:08
    0
    Here you need to know that supplement is Equal to 180

    Here how u would do it

    51 + x=180

    solve for x

    x=180 - 51

    x = 129

    So c is the answer to your question
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