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OpenStudy (anonymous):
Solve for x
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OpenStudy (anonymous):
OpenStudy (precal):
quadrilaterals equal 360 degrees so add them all up and find out how many degrees you are missing
OpenStudy (anonymous):
@precal is there like a formula ?
OpenStudy (nirmalnema):
sum of all angles of a quadrilateral = 360 75+80+55+25x=360 25x=360-210 25x=150 x=150/25 = 6
OpenStudy (anonymous):
Thank Yu
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OpenStudy (nirmalnema):
your welcome:
OpenStudy (precal):
well this is how I remember it. triangle equals 180 degrees
OpenStudy (precal):
|dw:1406054438162:dw|so a quadrilateral is really 2 triangles connected. There is a formula for the sum of the interior angles of any polygon
OpenStudy (precal):
180(n-2) n is the number of sides
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