Question
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Radiusi 12 sm bo 'Igan aylananing O markazidan 8 sm uzoqlikda P nuqta olindi. P nuqta
orgali AB vatar o’tkazildi. Agar bo’lsa, PB kesmani toping.

Ask by Wood Gray. in Uzbekistan
Mar 13,2025

Upstudy AI Solution

Tutor-Verified Answer

Answer

PB равно 20 сантиметров.

Solution

  1. Пусть дан круг с центром и радиусом см. Точка находится внутри круга, причем см.
  2. Через точку проведена хорда , при этом известно, что см.
  3. Для точки , расположенной внутри круга, знаменитое отношение (теорема о силе точки) имеет вид:
  4. Подставляем известные значения:
  5. Так как см, находим :
    см
Ответ: см.

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Bonus Knowledge

Aylananing markazi O dan P nuqtagacha bo’lgan masofa 8 sm. Aylananing radiusi esa 12 sm bo’lgani uchun, hammasini birlashtirish uchun P nuqta va O nuqtasining orasi 8 sm bo’lgach, AP nuqtasi - 4 sm. Shuning uchun AB vatarining uzunligini aniqlash uchun trigonometriyadan foydalanishimiz mumkin. P nuqtasida AP + PB = AB bo’lsin.
, ya’ni . Demak, sm.
Shunday qilib, PB kesmasi 8 sm ga teng.
Bundan tashqari, trigonometriya yordamida P nuqtasi orqali o‘tgan AB vatarini chizganda, u O nuqtasi bilan perpendikulyar temir yo‘lga aylanadi. Bu bizga A dan B gacha bo‘lgan uzunlikni faqat AP va PB qadri haqida so‘z yuritmasdan hisoblashga imkon beradi.

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