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Geometry help PLEASE!!!! 20 POINTS HELP!!’
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x = 12

Step-by-step explanation:

CDEF is a cyclic quadrilateral.

• the opposite angles of a cyclic quadrilateral sum to 180° , then

3x + 6x + 72 = 180

9x + 72 = 180 ( subtract 72 from both sides )

9x = 108 ( divide both sides by 9 )

x = 12
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