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27-04-2022
Mathematics

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Find the measurement of the missing angle of this quadrilateral.

Find the measurement of the missing angle of this quadrilateral class=

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27-04-2022

Answer:

x= 81°

Step-by-step explanation:

the interior angles of a quadrilaterial add up to 360°

143+80+56+x=360

condense left side: 279+x=360

isolate x: 279-279+x=360-279

x= 81°

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