Page 12 - E – Modul Rotasi_Nur Hafizhah Husna
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3. Rotasi 270 Terhadap Titik Pusat (A, B) 03
b – yˡ = x – a
yˡ = -x + a + b
xˡ – a = y – b
xˡ = y + a – b
(x, y) → (xˡ, yˡ) = (y + a – b,
-x + a + b)
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