Distance & midpoint in 2D
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Flip to reveal answersWhat is the 2D distance formula between (x1,y1) and (x2,y2)?
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All 4 Flashcards — Distance & midpoint in 2D
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Question
What is the 2D distance formula between (x1,y1) and (x2,y2)?
Answer
d = sqrt((x2-x1)^2 + (y2-y1)^2)
💡 Hint
Subtract coordinates first, then square.
Question
What is the midpoint formula in 2D?
Answer
M = ((x1+x2)/2, (y1+y2)/2)
💡 Hint
Average x-coordinates and y-coordinates separately.
Question
When do we use the 3D distance formula?
Answer
When points have x, y, and z coordinates.
💡 Hint
Add the z-difference squared as well.
Question
Common IB trap with distance questions?
Answer
Mixing up subtraction order before squaring and arithmetic slips.
💡 Hint
Squaring removes sign, but arithmetic still matters.
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Full study notes for Distance & midpoint in 2D
Topic 3.1 hub
3D space, volume, angles, and midpoints
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