2 Un triangolo è equivalente a un rettangolo. L'area del rettangolo misura \( 150 \mathrm{~cm}^{2} \), la base del triangolo misura 25 cm . Calcola la misura dell'altezza del triangolo.

4a If \( (0,1),(a, 3),(2,5) \) are collinear, find the value of a

Un cilindro y un cono tienen la misma base y altura. Si el radio de la base es de 4 cm y la altura es de 9 cm, calcula el volumen del cilindro y el volumen del cono.

b) Prove the following by vector method. Measure of the angle between two diagonals of a cube is \( \cos ^{-1} \frac{1}{3} \)

Calculate the combined volume of a cone with a base radius of 4 cm and height of 9 cm, and a cube with side length of 6 cm.

\( Q(7,10) \). Cari kecerunan bagi persamaan pembahagi dua sama serenjang untuk garis lurus \( P Q \). (TP4) A straight line passes through point \( (P(2,5) \) and point \( Q(7,10) \). Find the gradient of the equation of the perpendicular bisector for the straight line \( \overline{P Q} \) [3 markah / marks \( ] \)