Friday, May 8, 2020

MENSURATION

If four interior angles of a quadrilateral are (x+15), (x+10), (2x-45) and (x-30), what is the value of x?
sum of interior angle of quadrilateral is 360
so, (x+15)+(x+10)+(2x-45)+(x-30)=360
5x+25-75=360
5x=360+50
5x=410
x=82

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