Question

Define a degree measure.

Answer 1

If a rotation from the initial side to terminal side is ${\left(\frac{1}{360}\right)}^{th}$ of a revolution, the angle is said to have a measure of one degree, written as $1^o$.
Keen eye:
A degree is divided into $60$ minutes and a minute is divide into $60$ seconds. One sixtieth of a degree is called a minute, written as $1^{\prime }$ and one sixtieth of a minute is called second, written as $1"$
$\therefore 1^o-{60}^{\prime }$
$1^{\prime }=60"$