SOLUTION: a quadrilateral has angles 70degres , 90degres , 2x and 3x ,what is the value of x?and show me the formula.

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Question 402713: a quadrilateral has angles 70degres , 90degres , 2x and 3x ,what is the value of x?and show me the formula.
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
The sum of the interior angles in a quadrilateral is 360 degrees. Thus,

70 + 90 + 2x + 3x = 360

160 + 5x = 360

x = 40