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netineya [11]
3 years ago
11

Hey could anyone explain how to answer this kind of question? Or just solve and show what you did! Thank you!

Mathematics
1 answer:
STALIN [3.7K]3 years ago
4 0

Step-by-step explanation:

  • 9x-3=60°{each angle of equilateral triangle is 60°}
  • 9x=60+3
  • x=63/9
  • x=7

so,

  • 9x-3
  • 9×7-3
  • 63-3
  • 60°

hope it helps.

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Answer:

13.

Let us say

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