wavysouls
wavysouls wavysouls
  • 22-05-2017
  • Mathematics
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Can someone help me with #8

Can someone help me with 8 class=

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mreijepatmat
mreijepatmat mreijepatmat
  • 23-05-2017
The sum of all angles in a triangle = 180°, so: y°+y°+O=180°,==> 2y°+O=180°

Let's calculate O (angle NOP). We notice that O is the supplement of 120°

That mean O = 180°-120° = 60°. Now let's go back to 2y°+O=180

2y° + 60° = 180° ==> 2y° = 120° & y° = 60°
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