Question 904130


Definition: Complementary angles are the angles whose sum is {{{90}}} degrees 
 
let the angle be {{{x}}} (degrees) 

complementary angle will be  {{{4x}}}

 {{{4x+x=90}}} (by definition)
{{{ 5x=90}}}
 {{{x=90/5}}}
 {{{x=18}}} (degrees) 

 The required angle is {{{x=18}}} degrees and the complementary angle{{{4x=72}}} degrees.