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Homework Help: geometry

Posted by angela on Wednesday, June 27, 2012 at 8:54am.

DEF and ABC are complementary angles and ABC is nine times as large as DEF. Determine the measure of each angle.

• geometry - Steve, Wednesday, June 27, 2012 at 10:32am

  DEF + ABC = 90
  DEF + 9DEF = 90
  10DEF = 90
  DEF = 9
  ABC = 81
  

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