find the value of a and b
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It's a PARELLEOGRAM
*: (4a-8)+(8a-10)=90°
*: 12a-18=90
*:12a=90+18
*:a=108/12
*:a=9
now
*:(5b+6)=(8a-10)
*:5b+6=72-10
*:5b=62-6
*:b=56÷5
*:=11.2
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