Question 353516
{{{A+S=180}}}
.
.
{{{A=(1/4)S}}}
Substitute,
{{{(1/4)S+S=180}}}
{{{(5/4)S=180}}}
{{{S=(4/5)180}}}
{{{highlight(S=144)}}}degrees
.
.
{{{A=(1/4)(144)}}}
{{{highlight(A=36)}}}degrees