The measure of an angle of a parallelogram is 80 degree.Find its remaining angles.
The measure of its opposite angle is also 80 degree because opp. angles are equal .
The other two angles left are also equalso they can be named as x
the sum of all angles in parellelogram is 360 degree .then
80+x+80+x=360
160+2x=360
2x=360-160
2x=200
x=100
thus all the four angles are 80 , 80 , 100 and 100