Paper 2 · Geometry Lesson 13 of 16

LCOL Geometry 13: Proof of Theorem 6 (Practise)

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You’ll learn

  • On the LCOL course you do NOT have to learn this proof
  • The exterior angle of a triangle equals the sum of the two interior…
  • Write two things that both equal 180°, set them equal, and cancel the…

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