
POST-TEST
Authored by faiza ismawardani
Mathematics
9th Grade
Used 5+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Gambar di samping merupakan sebuah pencerminan dari sebuah objek dan hasil bayangan objeknya. Gambar tersebut yang menunjukkan hasil pencerminan yang benar adalah…
(i) dan (ii)
(ii) dan (iv)
(iii) dan (ii)
(i) dan (iv)
(i) dan (iii)
2.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Titik A(6, 3) mula-mula dicerminkan terhadap sumbu y, kemudian dicerminkan terhadap garis y = 5. Bayangan terakhir titik A adalah…
(-6, 3)
(-6, 7)
(6, 8)
(6, 13)
(-8, 13)
3.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Sebuah persegi panjang ABCD dengan A(3, 0), B(6, 4), dan P(3, 4) dengan P adalah perpotongan diagonal AC dengan BD. Bayangan persegi panjang oleh pencerminan terhadap garis y = x adalah…
A’(0, 3), B’(4, 6), C’(8, 3), D’(4, 0)
A’(0, -3), B’(4, -6), C’(8, -3), D’(4, 0)
A’(0, 3), B’(-4, 6), C’(-8, 3), D’(4, 0)
A’(0, -3), B’(4, 6), C’(-8, -3), D’(-4, 0)
A’(0, 3), B’(-4, 6), C’(-8, -3), D’(4, 0)
4.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Sebuah bayangan persegi panjang PQRS terletak pada bidang kartesius dengan koordinat titik P’(-3, -1), Q’(2, -1), R’(2, -3), dan S’(-3, -3) dicerminkan terhadap garis x = 1. Koordinat titik mula-mula pada persegi panjang PQRS adalah…
P(5, -1), Q(0, 1), R(0, 3), S(5, -3)
P(-5, -1), Q(0, -1), R(0, -3), S(5, -3)
P(5, -1), Q(0, -1), R(0, -3), S(5, -3)
P(-5, 1), Q(0, -1), R(0, 3), S(5, -3)
P(5, -1), Q(0, -1), R(0, 3), S(5, -3)
5.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Letak cermin yang benar untuk refleksi terhadap garis y = -x adalah…
6.
FILL IN THE BLANK QUESTION
2 mins • 15 pts
Tentukan titik koordinat bayangan yang terbentuk dari pencerminan terhadap garis y = 1!
Answer explanation
Pencerminan terhadap garis y = h :
(x, y) → (x, 2h –y)
Untuk y = 1
A(-3, -4) → A'(-3, 6)
B(2, -4) → B'(2, 6)
C(2, -1) → C'(2, 3)
D(-3, -1) → D'(-3, 3)
7.
FILL IN THE BLANK QUESTION
2 mins • 15 pts
Gambar di atas merupakan gambar dari setengah topeng singo barong. Topeng tersebut membentuk sebuah bangun yang diberi nama bangun ABCDE. Bangun tersebut diletakkan pada sebuah bidang kartesius dengan titik koordinat A(2, -6), B(4.5, -6), C(4.5, -2), D(4, -1), dan E(2, -1) yang dicerminkan terhadap titik asal O(0, 0). Tentukan letak koordinat bayangan tersebut!
Answer explanation
Pencerminan terhadap titik asal O(0, 0) :
(x, y) → (-x, -y)
A(2, -6) → A'(-2, 6)
B(4.5, -6) → B'(-4.5, 6)
C(4.5, -2) → C'(-4.5, 2)
D(4, -1) → D'(-4, 1)
E(2, -1) → E'(-2, 1)
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