Question 387385
Let the angles be {{{a}}} and {{{90 - a}}}
given:
{{{4/5 = a/(90 - a)}}}
{{{5a = 4*(90 - a)}}}
{{{5a = 360 - 4a}}}
{{{9a = 360}}}
{{{a = 40}}}
{{{90 - a = 50}}}
The angles are 40 degrees and 50 degrees