
PRE TEST
Authored by faiza ismawardani
Mathematics
9th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Gambar pencerminan yang benar adalah…
2.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Bayangan segitiga ABC dengan titik A(3, 5), B(6, 1), dan C(7, 5) oleh refleksi terhadap sumbu y adalah…
A’(-3, 5), B’(-6, 1), dan C’(-7, 5)
A’(-3, 5), B’(6, 1), dan C’(-7, 0)
A’(-3, 5), B’(6, 1), dan C’(5, -7)
A’(3, 5), B’(-6, 1), dan C’(5, 7)
A’(3, 5), B’(-6, 1), dan C’(7, 5)
3.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Titik A(-3,…) direfleksikan terhadap garis y = -2 dan menghasilkan bayangan A’(…, -9). Nilai dari titik-titik di atas berturut-turut adalah…
9 dan 3
-9 dan -3
5 dan -3
-5 dan 3
3 dan 9
4.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Titik A(0, 4) dicerminkan berturut-turut terhadap garis x = 2 dan garis y = 1. Bayangan terakhir titik A adalah…
(4, -4)
(4, -2)
(2, -4)
(2, -2)
(-2 , 4)
5.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Sebuah titik dicerminkan terhadap garis y = x menghasilkan bayangan (-1, 5). Koordinat titik mula-mula adalah…
(5, -1)
(-5, -1)
(5, 1)
(-5, 1)
(1 -5)
6.
FILL IN THE BLANK QUESTION
2 mins • 15 pts
Bayangan titik A terhadap garis oleh refleksi y = x adalah titik A’(4, -7). Tentukan koordinat mula-mula dari titik A!
Answer explanation
Pencerminan terhadap garis y = x
(x, y) → (y, x)
A(-7, 4) → (4, -7)
7.
FILL IN THE BLANK QUESTION
2 mins • 15 pts
Titik A(-1, -3) dicerminkan terhadap titik O(0, 0) kemudian dilanjutkan dengan pencerminan terhadap sumbu y dan dilanjutkan lagi dengan pencerminan terhadap garis y = x. Tentukan bayangan dari titik A tersebut!
Answer explanation
Pencerminan terhadap titik asal O(0, 0) :
(x, y) → (-x, -y)
A(-1, -3) → A'(1, 3)
Pencerminan terhadap sumbu y :
(x, y) → (-x, y)
A'(1, 3) → A"(-1, 3)
Pencerminan terhadap garis y = x :
(x, y) → (y, x)
A"(-1, 3) → A'"(3, -1)
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