25. Тип 18 № \( 5797 ; \) Нз точки \( M \) к окружности с центром \( O \) проведены касательные \( M A \) и \( M B \). Найдите расстояние между точками касания \( A \) н \( B \), если \( \angle A O B=60^{\circ} \) и \( M A=3 \).

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

43. What is the difference between the total surface area and curved surface area of a cylinder whose radius is equal to 10 cm ? \( \begin{array}{ll}\text { (a) } 200 \pi \mathrm{~cm}^{2} & \text { (b) } 300 \pi \mathrm{~cm}^{2} \\ \text { (c) } 100 \pi \mathrm{~cm}^{2} & \text { (d) } 10 \pi \mathrm{~cm}^{2}\end{array} \)

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.

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.