Question 217916
Let  x = common  angle,,,,,smaller  angle  = x/4
.
Remember  that  the  sum  of  the  interior  angles  of  a  triangle  =  180
.
x+x+x/4 =180
.
2.25x = 180
,
x=80
.
angles  of  triangle  are,,,,,80,,,80,,,20
.
check,,,  sum  to  180,,,,ok
.