Question 1076930

if angel {{{alpha= 42}}}

the complement {{{beta}}} will be (recall definition: complementary angles add up to {{{90}}}): 

{{{beta=90-alpha}}}

{{{beta=90-42}}}

{{{beta=38}}}

and supplementary angles add up to {{{180}}}): 

{{{beta=180-alpha}}}

{{{beta=180-42}}}

{{{beta=138}}}