Question

Write the supplement of the following angles.

$142°21\text{'}$

Answer 1

The two supplementary angles have the sum equal to $180°$

One angle is given $142°21\text{'}$, the other one will be $180°-142°21\text{'}=180°00\text{'}-142°21\text{'}37°39\text{'}$

Hence, the supplement of $142°21\text{'}$ is $37°39\text{'}$.