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8. The length of the diagonal of a square is 20 cmem. Its area isc) 300 mfield at(a) 400 cm(b) 200 cm() 100-2d a souare2 25 per metre is 7 2000

Answer»

A=a^2d=√2aA=1/2d^2=1/2 (20)^2=200cm^2



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