bella350
bella350
11-04-2018
Mathematics
contestada
They want us toSolve for x
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musiclover10045
musiclover10045
11-04-2018
the 3 inside angles of a triangle need to equal 180
you have 80 +60 = 140
so 51+x has to equal 180-140 or 40 degrees
51+x = 40
subtract 51 from each side
x = 40 - 51
x = -11
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Astute
Astute
11-04-2018
Just add up all 60 + 80 + 51 = 191.
191 - (-11) = 180 which is the number we would want to get.
(-11) would then because your answer as we do 180 + (-11) it would equal the sum of 191 which would be all the angles together.
Your answer: =
(-11)
Answer Link
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