## Trigonometry (11th Edition) Clone

$a: 71^{\circ}; b= 161^{\circ}$
1. Complementary angles have a sum of 90 degrees $a: 90^{\circ} - 19^{\circ}=71^{\circ}$ 2. Supplementary angles have a sum of 180 degrees $b: 180^{\circ}- 19^{\circ} =161^{\circ}$