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A badminton court is chalked out with corners at (0, 0), (9, 0), (9, 12) and (0, 12), the units being metres. A diagonal line is drawn from (0, 0) to (9, 12).
How long is that diagonal line?

Class 10Distance FormulaGeometry — Coordinates
  • A15 m
  • B21 m
  • C
  • D12 m

Step-by-Step Solution

Diagonal m. The value 21 m is 9 + 12, the distance covered by walking along two sides instead of cutting across; comes from 144 - 81, subtracting the squares instead of adding them.
Answer: A) 15 m

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