kaka bantu kaka plisssss

y = ½ x + 5
½ x - y + 5 = 0

a = ½
b = -1
c = 5

Berpusat di (0,0) => (x , y)

r = |ax + by + c| / √ (a² + b²)
r = |½(0) - 1(0) + 5| / √( [½]² + [-1]²)
r = 5 / √(¼ + 1)
r = 2√5

Persamaannya
x² + y² = r²
x² + y² = (2√5)²
x² + y² = 20