r² = (Δx)² + (Δy)²
r² = (4 - 0)² + (5 - 0)²
r² = 4² + 5²
r² = 16 + 25
r² = 41
Persamaan lingkaran dengan pusat (0,0)
x² + y² = r²
x² + y² = 41
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r² = (Δx)² + (Δy)²
r² = (4 - 0)² + (5 - 0)²
r² = 4² + 5²
r² = 16 + 25
r² = 41
Persamaan lingkaran dengan pusat (0,0)
x² + y² = r²
x² + y² = 41