Question

Tolong dong cuma tiga aja pliss aku mau ulangan bsk:( Makasi klo mau bantuin

Answer 1

Bayangan setelah translasi :
x' = x + a
y' = y + b

x' = -2 + 3
y' = 7 + (-4)

x' = 1
y' = 3

= (1, 3)

Bayangan setelah refleksi :

x' = -y
y' = -x

x' = -3
y' = -1

= (-3, -1)

Bayangan setelah didilatasi:



(x') = (-2 0)(x)
(y')    (0 -2)(y)

(x') = (-2x + 0y)
(y')    (0x - 2y)

x' = (-2(-3))
y' = - (2(-1))

x' = 6
y' = 2

jadi bayangannya di titik (6, 2)

==========

setelah direfleksikan :

x' = x
y' = 2b - y

x' = 12
y' = 2(-3) - 3

x' = 12
y' = -9

= (12, -9)

setelah dirotasikan :

(x') = (cosα -sinα)(x)
(y') = (sinα cosα)(y)

(x') = (cos270 -sin270)(x)
(y') = (sin270 cos270)(y)

(x') = ( 0 1)(x)
(y') = (-1 0)(y)

(x') = (0x y)
(y') = (-x 0y)

x' = -9
y' = -(12)

= (-9, -12)

catatan :
yang ada
(x')
(y')

itu maksudnya matriks, ya.