Posted by Twg on .
Three angles of a quadrilateral each measures 87*(degrees)..what is the measure of the fourth angle??

MATH Prob. 
Ms. Sue,
See if you can figure it out after studying this site.
http://www.mathsrevision.net/gcse/pages.php?page=17 
MATH Prob. 
Reiny,
All 4 of them have to add up to 360º
so far you have 3x87 or 261º
So how big is the fourth angle ? 
MATH Prob. 
kiria,
If a quadrilateral has two 75 angles and 110 angles what measure is remaining angle

MATH Prob. 
monika,
99degree