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Mata Pelajaran : MatematikaKelas : XI SMA
Kategori : Lingkaran
Kata Kunci : Persamaan Lingkaran
Kode : 11.2.4 [Matematika SMA kelas 11 Bab 4 Persamaan Lingkaran]
Pusat (1,-2)
(x-1)² + (y-(-2))² = r²
Melalui (-1, 4)
(-1-1)² + (4+2)² = r²
-2² + 6² = r²
4 + 36 = r²
40 = r²
Persamaan lingkaran
(x - 1)² + (y + 2)² = r²
x² - 2x + 1 + y² + 4y + 4 = 40
x² + y² - 2x + 4y + 1 + 4 - 40 = 0
x² + y² - 2x + 4y - 35 = 0