$\triangle ABC$ uchburchagida $\angle A=30^{\circ}$, $\angle B=70^{\circ}$. $\angle C$ ning o'lchamini toping.
- A. $80^{\circ}$
- B. $90^{\circ}$
- C. $100^{\circ}$
- D. $110^{\circ}$
Burchaklar va masofalar bo‘yicha savol
Javob va yechimni ko‘rish
Javob: $80^{\circ}$
Uchburchakning ichki burchaklari yig‘indisi $180^{\circ}$ ga teng. Shuning uchun
\[
\angle C = 180^{\circ}-\angle A-\angle B = 180^{\circ}-30^{\circ}-70^{\circ}=80^{\circ}.
\]
Demak, $\angle C$ ning o‘lchami $80^{\circ}$, ya’ni javob **A**.
Mavzuni mustahkamlang
Bu savol Burchaklar va masofalar mavzusiga tegishli. Ta’riflar, formulalar va misollarni mavzu sahifasida ko‘ring.
Mavzuni o‘rganishShu mavzudagi boshqa savollar
$\triangle ABC$ to'g'ri burchakli bo'lib, $\angle B = 90^\circ$, $AB = 3\,\text{sm}$, $BC = 4\,\text{sm}$. $AC$ ning uzunligini toping.A va B nuqtalari orasidagi masofa $12\ \text{sm}$. Nuqta C, $AB$ kesmasining ichida joylashgan bo‘lib, $AC = 7\ \text{sm}$ ga teng. $CB$ masofasini toping.5 sm va 12 sm tomonlari berilgan to'g'ri to'rtburchakning diagonal uzunligini toping.Nokta $O$ va $P$ orasidagi masofa $12\,\text{cm}$. $O$ nuqtasining uzantisida, $O$ ning chap tomonida $5\,\text{cm}$ ga joylashgan $Q$ nuqtasi berilgan. $QP$ masofasini hisoblang.To'g'ri burchakli uchburchakda katetlar uzunliklari $3\,\text{cm}$ va $4\,\text{cm}$. Gipotenuzaning uzunligini toping.