alleryIn 3D, distance between points P(x₁, y₁, z₁) and Q(x₂, y₂, z₂):
Asqrt(x²+y²+z²)
B|x₁-x₂|
Csqrt((x₂-x₁)² + (y₂-y₁)² + (z₂-z₁)²)
Dx₁ + x₂
Answer & Solution
Correct answer: C. sqrt((x₂-x₁)² + (y₂-y₁)² + (z₂-z₁)²)
3D distance formula: extension of 2D Pythagoras.
d = sqrt(Δx² + Δy² + Δz²).
Keep practising Unit 8A: Areas Between Curves
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