Soal Transformasi Geometri Kelas 9 [top]

Transformasi geometri adalah salah satu materi matematika yang wajib dipelajari di bangku SMP kelas 9. Materi ini membahas bagaimana suatu titik, garis, atau bidang kurva dapat berubah posisi, ukuran, atau arahnya dalam koordinat Kartesius.

[ A'(x', y') = (x + a, y + b) ]

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Dalam kurikulum kelas 9, ada empat jenis transformasi yang wajib dikuasai: To gather sufficient information, I will perform a

Pencerminan terhadap garis horizontal $y = h$ memiliki rumus: $(x, y) \to (x, \ 2h - y)$. Dengan $h = 2$, maka: $x' = 2$ $y' = 2(2) - (-4) = 4 + 4 = 8$ Jadi, $C'(2, 8)$.

Step 1: Reflection over x-axis → X₁ = (5, 3) Step 2: Rotation 180° → X₂ = (-5, -3)