Page 14 - LAS MEDIA PEMBELAJARAN RADIKA ANANDA_4191111013
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Rotasi Terhadap Titik Pusat (a, b)
°
– b = x – a
′
= x – a + b
′
a – = y – b
′
= -y + a + b
′
(x, y) → ( , ) = (-y + a+ b, x – a + b)
′
′
10
