Question

How do you get the central angle with the radius and arc length with the formula theta/360 x 2 x pi x r ?

Answer 1

The formula is ,

`\begin{gathered} =\pi r^2 \\ =(\theta)/(360)*\pi* r^2 \end{gathered}`

If the area of the given quater of the circle is given then we can find the value of theta.

And if the arc length is given then we can also find the angle

`\begin{gathered} l=\theta* r \\ \theta=(l)/(r) \end{gathered}`