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7 September, 12:51

If the measure of arc DEF is 248°, what is the measure of ∠DEF?

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  1. 7 September, 15:59
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    According to formulas, the measurement of arc DF is twice the measurement of ∡DEF. Arc DF is equal to 360-248 or 112. Hence ∡DEF is equal to 56 degrees.
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