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**[URGENT] Differentiation of Geomertic Objects**

**1. Homework Statement**

A sector of a circle has area 100cm². Show that the perimeter of this sector is given by te formula P = 2r + 200/r

**2. Homework Equations**

Area of sector = (angle/360) x pi x r^2

Permiter of sector = (angle/360) x 2 pi x r

**3. The Attempt at a Solution**

I've tried but i don't really have time to write it all out. Can someone just show me how to do this one, so that i can try the other questions in the chapter

Thanks