13. Şəkildə, düz xətt üzərində neçə şüa var? \( \begin{array}{lllll}\text { A) } 8 & \text { B) } 5 & \text { a A B C D } \\ \text { C) } 10 & \text { D) } 6 & \\ \text { E) } 12 & \end{array} \)

[b] A sphere, its volume is \( 36 \pi \mathrm{~cm}^{3} \). Calculate its area.

5.3. A diameter and a chord, which is equal to the radius, are passed from the given point of the circle. Find the angle between them.

5.3. A diameter and a chord, which is equal to the radius, are passed from the given point of the circle. Find the angle between them.

В треугальнике \( A B C \) сторона \( A B \) равна 47 , угол \( C \) равен \( 150^{\circ} \) Найдите радиус описанной около этого треугольника окруж ности. Ответ:

5.3. A diameter and a chord, which is equal to the radius, are passed from the given point of the circle. Find the angle between them.