Titik A(a,b) mengalami transformasi pencerminan terhadap garis y = -x dilanjutka...
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Titik A(a,b) mengalami transformasi pencerminan terhadap garis y = -x dilanjutkan rotasi terhadap titik O(0,0) sebesar 900 diperoleh titik bayangan A'(-8,-6). Nilai dari a -2b = ....
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