8. If the ratio of the corresponding sides of two similar triangles is 35 , and the area of the smaller triangle is \( 27 \mathrm{~cm}^{2} \), then what is the area of the larger triangle? 9. If the area of two similar triangles are \( 144 \mathrm{~cm}^{2} \) and \( 720 \mathrm{~cm}^{2} \). Then find the ratio of the corresponding sides. 10. If Rectangle ABCD is similar to Rectangle EFGH, and \( \mathrm{AB}=10 \mathrm{~cm}, \mathrm{BC} \) \( =6 \mathrm{~cm} \) and \( \mathrm{FG}=18 \mathrm{~cm} \) then, what is a. The length of EF? b. The Area of Rectangle EFGH?

29 Troba un vector de mòdul 50 que sigui perpendicular al vector \( \vec{a}(8,6) \).

526. The degree measures of the arcs \( A B \) and \( A C \) of a circle are \( 180^{\circ} \) and \( 38^{\circ} \) respectively. Find the angle \( B A C \) (consider wo wases).

¿Cuál es la relación entre el radio y la altura de un cilindro si sabemos que su volumen es igual a \( 50\pi \) cúbicas? Calcula esta relación si el radio es 5.

5 Considera el vector \( \overrightarrow{\mathrm{u}}(3,-4) \). Calcula: a) Un vector paral. lel a \( \overrightarrow{\mathrm{u}} \) de mòdul 1 . b) Un vector perpendicular a \( \overrightarrow{\mathrm{u}} \) de mòdul 2 .

he point \( M(-4,-6) \) is rotated \( 90^{\circ} \) clockwise around the origin. What are the coordinates of he resulting point, \( M \) ?