Bánh xe to có bán kính 5 dm , bánh xe nhỏ có bán kính 3 dm . Vậy chu vi bánh xe to lớn hơn chu vi bánh xe nhỏ ..... dm.

Angles 3 and 5 are \( \square \) and \( m \angle 5 \) is \( (2 x+11)^{\circ} \).

A ball bounces \( \frac{1}{2} \) of its previous height on each bounce. Find the total distance covered by the ball, until it comes to rest, if it is dropped from a height of 20 metres.

Find the equation of line perpendicular to \( 5 x-3 y+4=0 \) that passes through the point \( (-4,1) \).

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 .

Find the perpendicular d \( x^{2}+y^{2}-8 x+2 y+8 \) Hence, find the shortest