roxanapop roxanapop
  • 07-09-2018
  • Mathematics
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Please I need help on the first one. Can someone explain it to me or answer it

Please I need help on the first one Can someone explain it to me or answer it class=

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Vowing
Vowing Vowing
  • 07-09-2018

[A]

This is because a complement is another angle that when you add both of the angles together, it equals 90 degrees.

18*4=72

18+72=90

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