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## Answers

area of circle = πr² sq.units

circumference or perimeter of circle = 2πr units (or) πd units

area of semi circle = πr²/2 sq.units

circumference of semi circle = πr units

perimeter of semi circle = πr+d units

area of sector = Ф/360 x πr² sq.units

length of arc of sector = Ф/360 x 2πr units

hope dis helps....