3.3. A l'aide de l'égalité choisie à la question précédente, calculer la longueur [OP]. 3.4. L'artisan engagé sur le pare considère qu'il faut un pilier de 5 mètres. A-t-il raison ? Rédiger la réponse.

In the following equations: The circle whose centre lies on the \( y \)-axis and does not intersect the \( x \)-axis is \( \begin{array}{ll}\text { (a) } x^{2}+(y-1)^{2}=4 & \text { (b) } x^{2}+(y-5)^{2}=25 \\ \text { (c) } x^{2}+(y+5)^{2}=9 & \text { (d) }(x+5)^{2}+y^{2}=16\end{array} \)

The edge of a cube is doubled. By what factor will its surface area and volume increase?

A cuboid has a total surface area of \( 94 \mathrm{~cm}^{2} \). If its length is 5 cm and breadth is 3 cm , find its height.

The geometrical centre of square ABCD is the origin and its side length is \( 2 \sqrt{3} \) , then the equation of the circle that touches its sides is \( \begin{array}{ll}\text { (a) } x^{2}+y^{2}=3 & \text { (b) } x^{2}+y^{2}=12 \\ \text { (c) } x^{2}+y^{2}=6 & \text { (d) }(x-\sqrt{3})^{2}+(y-\sqrt{3})^{2}=3\end{array} \)

1. If the point \( A \) moves on the line \( x=3 \) and the point \( B \) moves on the line \( O A \) where; \( (\overline{O A})(\overline{O B})=6 \) and \( O \) is the origin. Find the Geometric Locus of the point \( B \).