jawabannya digambar ya..
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jawabannya digambar ya..
= ( ½ x 22/7 x ( 42/2 )² ) + ( 42 x 18 / 2)
= (11/7 x 21²) + (42 x 9)
= 11 x 441/7 + 378
= 11 x 63 + 378
= 693 + 378
= 1.071 cm²