a = ¼(7*7)π-½(7*7)
a = ¼(49π)-½(49)
a = ¼(49π-98) square units.
b = 2a
b = 2*¼(49π-98)
b = ½(49π-98) square units.
It implies;
Area of red region is;
Half area square with side 14 units - b
= ½(14*14)-½(49π-98)
= ½(196)-½(49π)+½(98)
= 98-½(49π)+49
= 147-½(49π)
= ½(294-49π) square units.
= 70.0309799871 square units exactly in decimal.
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