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Australian AMC 2012 - Intermediate Question 15

AMC AUSTRALIA · Australian AMC 2012 - Intermediate

Question 15

This sheriff’s badge has ten equal sides, five $60^\circ$ angles and five equal reflex angles.

Question illustration

The value of $x$ is
  1. 108
  2. 132
  3. 135
  4. 138
  5. 140