Known :
r = 5 cm
θ = 360° - 90° = 270°
Asked :
Arc length of the partial circle = ...?
Answer :
Arc length
[tex] = \frac{θ}{360} \times 2\pi r \\ = \frac{270}{360} \times 2 \times 3.14 \times 5 \\ = \frac{3}{4} \times 31.4 \\ = \frac{3}{4} \times \frac{314}{10} \\ = \frac{942}{40} \\ = 23.55 \: cm[/tex]
So, the arc length of the partial circle is 23,55 cm
Hope it helps and is useful :)
