The angle of a sector of a circle of radius is . if , what is the perimeter of the sector?

courageTyro

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This answer was edited.Perimeter of sector=

Perimeter of sector=

2\times 4.2+\dfrac{150}{360}\times 2\times \dfrac{22}{7} \times 4.2\Rightarrow P=8.4 + 0.417\times 2 \times 3.142\times 4.2\Rightarrow P=8.4 + 11.0058\therefore P=19.4058cm$

Perimeter of sector=

Perimeter of sector=