Hey there!!
Supplement angle, these angles add up to 180°
Let's take the smaller angle as ' x '
Then, the larger angle would be ' 2x '
Hence,
[tex]x + 2x = 180[/tex]
[tex]3x = 180[/tex]
[tex]x = \frac{180}{3}[/tex]
[tex]x = 60[/tex]
Hence, the smaller angle is 60°
Hope my answer helps!