Question

bantu jawab please banget jangan asal asalaannnnnnnnnnnnnnnnn !!!!​

Answer 1

pembahasan :

270⁰ searah jarum jam berarti = 90⁰ berlawanan jarum jam.

Rotasi pusat(a, b) sejauh 90⁰ :

[ x' - a ] = [cos 90⁰ -sin 90⁰ ][x - a]

[y' - b ] [sin 90⁰ cos90⁰ ][y - b]

a = -5

b = 1

x = 6

y = 5

[ x' - -5 ] = [ 0 -1 ][x - -5]

[y' - 1 ] [ 1 0 ][y - 1 ]

x' + 5 = -(y - 1)

x' = -y +1 - 5

x' = -y - 4

x' = -5 - 4

x' = -9

y' - 1 = x - -5

y' = x +5 + 1

y' = 6 + 6

y' = 12

Q'(-9, 12)

jawaban :

Opsi E