Here is my query
Find two supplementary angles one of which is four fifth of the other?
LET ONE SUPPLEMENTARY ANGLE BE 'x'.
THE EQUATION WILL BE:-
x + 4/5x=180 degrees
5/5x + 4/5x=180 degrees
9/5x=180 degrees
x=100 degrees
4/5x=100 x 4/5
=80 degrees
THEREFORE,THE SUPPLEMENTARY ANGLES ARE 100 AND 80 DEGREES.