
Geometri Transformasi
Authored by M.Najmul Ula
Mathematics
9th Grade
Used 3+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Titik (3,2) dicerminkan terhadap sumbu x, maka koordinat bayangan titik A adalah.....
(3, -2)
(-3, -2)
(-3, 2)
(3, 2)
Answer explanation
A (x,y) -> A' (x,-y)
A (3,2) -> A' (3,-2)
2.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Bayangan dari Titik A (-2,3) dirotasikan sebesar 90 derajat berlawanan arah jarum jam adalah....
(2, -3)
(-3, -2)
(3, 2)
(-3, 2)
Answer explanation
Rotasi dengan pusat O (0, 0) sebesar 90 derajat
P (x,y) ----> P' (-y, k)
A (-2,3) ----> A' (-3, -2)
3.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Titik P (2,-4) adalah bayangan titik P (3,5) oleh translasi T. Translasi T= .....
(-1, -9)
(-1, 9)
(1, -9)
(1, 9)
Answer explanation
P (x, y) ----> P' (x+a, y+b)
P (3, 5) ----> P' (2, -4)
x = 3 ; y = 5
x+a = 2
y+b = -4
a = 2-x
a = 2-3
a = -1
b = -4-y
b = -4-5
b = -9
4.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Koordinat titik K (2,-4) dicerminkan terhadap garis Y =x, maka koordinat dari bayangan yang terbentuk adalah....
(-4, -2)
(4, -2)
(-2, 4)
(-4, 2)
Answer explanation
Pencerminan terhadap garis y = x
P (x, y) ----> P' (y, x)
K (2, -4) ----> K' (-4, 2)
5.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Koordinat bayangan segman garis AB,dengan A(2,2) dan B(4,-2) oleh dilatasi dengan faktor dilatasi k=3 dan pusat dilatasi O adalah....
A (2,-2) dan
B (6,6)
A (6,6) dan
B (12,-6)
A (4,-2) dan
B (12,6)
A (12,6) dan
B (12,7)
Answer explanation
(x, y) ----> (xk, yk)
A (2, 2) ----> (2.3, 2.3) = (6, 6)
B (4, -2) ----> (4.3, (-2).3) = (12, -6)
A' = (6, 6)
B' = (12, -6)
6.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Bayangan titik C (-3, 5) dan D (5, 4) yang ditranslasikan oleh T = [3, -2] adalah ....
C' (0,3) dan
D' (8,2)
C' (9,10) dan
D' (15,8)
C' (0,-3) dan
D' (-8,2)
C' (10,9) dan
D' (8,15)
Answer explanation
Rumus :
(x, y) [oleh T (a, b)] ----> (x+a, y+b)
C (-3, 5) [oleh T (3, -2)] ----> (-3+3, 5+(-2)) = (0,3)
C' = (0,3)
D (5, 4) [oleh T (3, -2)] ----> (5+3, 4+(-2)) = (8, 2)
D' = (8, 2)
7.
MULTIPLE CHOICE QUESTION
45 sec • 10 pts
Bayangan titik A oleh refleksi terhadap titik (1,-2) adalah A’ (3,5). koordinat titik A adalah.....
A’ (1, 9)
A’ (-1, -9)
A’ (-9, 1)
A’ (9, 1)
Answer explanation
(x, y) terhadap (a, b) = (2a-x, 2b-y)
A (x, y) terhadap (1, -2) oleh A' (3, 5)
A [2.1-x, 2(-2)-y] = A' (3, 5)
2-x = 3
x = -1
-4-y = 5
y = -9
Jadi, A (-1, -9)
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