ഓരോ ബാഹ്യ കോണുകളും 24° ആയ, ഒരു സാധാരണ ബഹുഭുജത്തിന്റെ വികർണ്ണങ്ങളുടെ എണ്ണം കണ്ടെത്തുക, 

  1. 45 
  2. 36 
  3. 90 
  4. 60 

Answer (Detailed Solution Below)

Option 3 : 90 
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Detailed Solution

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തന്നിരിക്കുന്നത്:

ഓരോ ബാഹ്യ കോണുകളും 24° ആണ്.

ആശയം:

ഒരു സാധാരണ ബഹുഭുജത്തിന്റെ ബാഹ്യകോണുകളുടെ തുക = 360°

ഉപയോഗിച്ച സൂത്രവാക്യം: 
ഒരു സാധാരണ ബഹുഭുജത്തിന്റെ ബാഹ്യകോണുകൾ ഓരോന്നും= 360/n

ഒപ്പം 

വികർണ്ണങ്ങളുടെ എണ്ണം = n(n – 3)/2

ഇവിടെ, n = വശങ്ങളുടെ എണ്ണം 

കണക്കുകൂട്ടൽ:

വശങ്ങളുടെ എണ്ണം = 360/24 = 15

അതുകൊണ്ട്,

വികർണ്ണങ്ങളുടെ എണ്ണം = (15 × 12)/2 = 90
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