7. Di un rombo \( A B C D \) si conoscono il vertice \( A(0,-1) \), il punto medio \( M(2,0) \) della diagonale \( A C \) e si sa che il vertice \( B \) appartiene alla bisettrice del primo e del terzo quadrante. Determina i restanti vertici del rombo \( A B C D \) e calcola larea del rombo. 8. Nella figura i punti \( A, B, C \).

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.

61. A fountain pen with a cylindrical barrel of diameter 2 cm and height 10.5 cm , filled with ink, can write 3300 words. How many words can be written with that pen using 100 ml of ink? (Take \( 1 \mathrm{cc}=1 \mathrm{ml} \) ) \( \begin{array}{ll}\text { (a) } 40,000 & \text { (b) } 30,000\end{array} \)

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.

A rectangular prism has a length of 5 cm, a width of 3 cm, and a height of 4 cm. Calculate its volume.

A rectangular prism has dimensions of length 5 meters, width 3 meters, and height 2 meters. Calculate the volume of the prism.