ABCD என்பது சரிவகம் என்றால், AC மற்றும் BD என்பது O புள்ளியில் ஒன்றையொன்று வெட்டும் மூலைவிட்டங்கள், பின்னர் AC : BD:

This question was previously asked in
RRB ALP Previous Paper 5 (Held On: 10 Aug 2018 Shift 3)
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  1. AB + AD : DC + BC
  2. AB : CD
  3. OA – OC : OB – OD
  4. AD : BC

Answer (Detailed Solution Below)

Option 3 : OA – OC : OB – OD
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F1 S.C 23.1.20 Pallavi D2

O என்பது மூலைவிட்டங்கள் வெட்டும் புள்ளி,

AB ∥ CD

ΔOAB மற்றும் ΔOCD இல்,

∠OAB = ∠OCD,

∠OBA = ∠ODC,

∠AOB = ∠COD,

⇒ ΔOAB மற்றும் ΔOCD ஆகியவை ஒத்தவை,

⇒ OA/OC = OB/OD       ----(1)

⇒ OA/OC + 1 = OB/OD + 1

⇒ AC/OC = BD/OD

⇒ AC/BD = OC/OD        ----(2)

OA/OC = OB/OD = α (ஆக இருக்கட்டும்)

⇒ OA = αOC, OB = αOD

⇒ OA – OC = αOC – OC = OC(α - 1),

OB – OD = αOD – OD = OD(α - 1)

⇒ (OA – OC) / (OB – OD) = {OC(α - 1)}/{OD(α - 1)}

= OC/OD

∴ AC/BD = (OA – OC) / (OB – OD)
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