doppio0 doppio0
  • 26-02-2021
  • Mathematics
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lauralazda1
lauralazda1 lauralazda1
  • 26-02-2021
angles on a straight line add up to 180 degrees.
180-100 = 80
x + 3x = 4x
80/4 = 20
x = 20 degrees
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