daniellalegerruiz
daniellalegerruiz daniellalegerruiz
  • 24-04-2020
  • Mathematics
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I need help with this question

I need help with this question class=

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amckinney22003
amckinney22003 amckinney22003
  • 24-04-2020
I think the answer is A. 40
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averybutler8
averybutler8 averybutler8
  • 24-04-2020
The correct answer is B) 50.

Straight lines add up to 180 degrees. The outside angle measurements given would tell us that the two known angles are 40 (180-140=40) and 90 (180-90=90). Since triangles must add up to 180 degrees, we take 180-90-40= 50, which is the measure of the missing angle.
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