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anonymous

  • one year ago

What is the measure of AC ? http://media.apexlearning.com/Images/200701/18/9601f992-4884-4afa-9bed-d07e40b1cfec.gif A. 138 B. 132 C. 42 D. 48

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  1. triciaal
    • one year ago
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    |dw:1439921332214:dw|

  2. triciaal
    • one year ago
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    the angle by the chord is half the angle at the center so angle at center = 42 *2 = 84 the figure is symmetrical so 360-84 divided by 2 = alternate view da = de dc = 180 cad = 180 = ca + ad so ca = 180 - ad = 180- 42

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