posted by Twg .
Three angles of a quadrilateral each measures 87*(degrees)..what is the measure of the fourth angle??
See if you can figure it out after studying this site.
All 4 of them have to add up to 360º
so far you have 3x87 or 261º
So how big is the fourth angle ?
If a quadrilateral has two 75 angles and 110 angles what measure is remaining angle