christy99 christy99

01-12-2015
Mathematics

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A quadrilateral has angles that measure 87° 69° in 104° what is the measurement of the fourth angle

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redcloud redcloud

01-12-2015

A quadrilateral has angles that add up to 360° so x is the fourth angle in 87+69+104+x=360
260+x=360
x=100° is the fourth angle

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loveysunshine loveysunshine

01-12-2015

The sum of a quadrilaterals angles is 360 degrees. You have three of the angles so just need to add those and subtract from 360. Answer is 360-260=100 degrees

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