Answer :
the point A is in the middle of the circle so the formula of the arc is:
[tex]\begin{gathered} A=r\theta \\ \end{gathered}[/tex]So in our problem will be:
[tex]\begin{gathered} A=5\cdot0.7(180) \\ A=5\cdot126 \\ A=630 \end{gathered}[/tex]the point A is in the middle of the circle so the formula of the arc is:
[tex]\begin{gathered} A=r\theta \\ \end{gathered}[/tex]So in our problem will be:
[tex]\begin{gathered} A=5\cdot0.7(180) \\ A=5\cdot126 \\ A=630 \end{gathered}[/tex]