please answer the 3 question ....only digure 1
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say diameter =2r
given diameter as 21cm
so radius =21/2 cm
now area of 1st semi - circle =pie r^2/2
we have 4 semi circles of same radius means two circles
area of circle = 2× (22/7×21/2×21/2)
area =33×21cm^2
area =693cm^2
given diameter as 21cm
so radius =21/2 cm
now area of 1st semi - circle =pie r^2/2
we have 4 semi circles of same radius means two circles
area of circle = 2× (22/7×21/2×21/2)
area =33×21cm^2
area =693cm^2
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