67. Отрезки \( A D \) и \( \frac{B C}{-} \) - диаметры окружности, центром ко- торой является точка \( \bar{O} \) (puc. 48, б). Докажите, что треугольни- ки \( B O A \) и \( D O C \) равны.

Objectives 1) Solve real-world problems involving the surface area and volume of cylinders, cones, and spheres through expansion and factorization. 2) Calculate the surface areas and volumes of cylinders, cones and spheres. N.B: You should know by heart the area and perimeter of a square, rectangle, and circle. The formulas of the surface area and volumes of the cylinder, cones, and spheres be given.

Persamaan lingkaran berpusat di titik \( \mathrm{O}(0,0) \) dan melalui titik \( (-4,-6) \) adalah.... A. \( x^{2}+y^{2}=16 \) B. \( x^{2}+y^{2}=36 \) C. \( x^{2}+y^{2}=48 \) D. \( x^{2}+y^{2}=52 \)

2. Titik \( L(9,-2) \) dicerminkan terhadap \( x=2 \) kemudian dilanjutkan translasi \( T\binom{-2}{4} \), bayangan titik \( L \) adalah \( \ldots \) \( \begin{array}{llll}\text { A. }\binom{-5}{2} & \text { B. }\binom{-3}{4} & \text { C. }\binom{7}{6} & \text { D. }\binom{7}{2}\end{array} \)

3. Bayangan dari titik \( \mathrm{C}(-2,3) \) yang dirotasikan 90 dengan pusat \( (1,2) \) dilanjutkan rotasi 270 searah dengan jarum dan pusat \( (0,0) \) adalah... A. \( (0,-1) \) B. \( (1,0) \) C. \( (0,5) \) D. \( (-1,0) \) E. \( (0,-5) \)

Given your sister's incomplete text, "Meet me at the trails located at \( (-2 \), " Explain why the trails must be in quadrant 2 or quadrant 3 .