Question

How many of the following statements are correct?

(1)$\frac{1}{{360}^o}$ of a complete circular turn is called a radian.

(2) The angle subtended by an arc of a circle whose length is equal to the radius of the circle is called a degree.

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Answer 1

(1) is the definition of degree and (2) is the definition of radian
(1) For those who know ${360}^o$ is equal to one complete rotation, the definition is intuitive.
(2)

When the arc length = radius, we get one radian.
$Keysteps:$ (1) knowing the definition of degree and radian.