<PRE><B>Question 370953</B>
&lt;br&gt;&lt;font face=&quot;Tahoma&quot;&gt;Let x be the angle, the supplement of x is (180-x), and the complement of x is (90-x) &lt;br&gt;

Then we have:&lt;br&gt;

{{{(180-x)+100=3x}}}&lt;br&gt;

{{{280-x=3x}}}&lt;br&gt;

{{{280=4x}}}&lt;br&gt;

{{{x=70}}}&lt;br&gt;

So the original angle is 70, thus we have:&lt;br&gt;

Supplement: {{{180-70=110}}}&lt;br&gt;

Complement: {{{90-70=20}}}&lt;br&gt;

Therefore, the angle is 70, its supplement is 110, and its complement is 20.&lt;br&gt;

I hope this helps!&lt;br&gt;</PRE>