#1
does anyone know the measure for a trapezoid? is there even a measure for it?? i know a triangles measure is 180
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#3
f(n) = 180n-360

N=amount of sides.

So a trapezoid would be 180(4)-360.

All trapezoid angles add up to 360 degrees, always.

Remember the formula though, it's helpful and will probably come up sometime in your math course.