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Pls help with my e learning

Pls help with my e learning-example-1

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Answer:

12. We have that 32 cm is the shaded region

  • 7×6=42
  • 42-33cm= 9cm
  • Hence the white are is 9cm
  • Then 8×9=72 cm
  • 72cm -9cm= 63 cm^2
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