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A game spinner is split from its centre into four colours. Red is 100° and blue is 80°, so together they make a straight angle. Green is 3 times yellow. How big is green?

Class 7Angles Around a PointLines and Angles
  • A135°
  • B120°
  • C90°
  • D45°

Step-by-Step Solution

Red + blue = 180°, so yellow + green = 360° − 180° = 180°. If yellow = , then °, ° and green = 135°.
Answer: A) 135°

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