3. Дан параллелограмм \( X O S K \), в котором на стороне \( S K \) взята произвольная точка \( R \). Прямь \( O R \) и \( X K \) пересекаются в точке \( F \), которая находится вне параллелограмма. Найдите \( R F \) и \( F K \), если \( S R=45 \) см, \( K R=22.5 \mathrm{~cm}, O R=40 \) см, \( X K=31 \mathrm{~cm} \).

The coordinates of triangle \( A B C \) are \( A\left(-4 \frac{1}{2},-2 \frac{1}{2}\right), B\left(-4 \frac{1}{2},-1\right) \), and \( C(6,-1) \) a. What is the distance between points A and \( B \) ? b. Give the coordinates for two points that are 4 units from point \( C \).

VI. Determine the equation of the straight line in ordinary form that passes through the point \( (-2,5) \) and is parallel to the line \( 3 x-y=10 \).

\begin{tabular}{l} 6.2. A cylinder has a radius of 7 cm and height of 10 cm . \\ \( \square \) \\ \hline \( .2 .1 \quad \) Calculate the volume of the cylinder. (if \( \pi=3,14 \) ) \end{tabular}

Defina o que é o raio de um círculo e como ele se relaciona com o diâmetro.

a. Points A and B are 1.5 units apart. (Type an integer, fraction, or mixed number.) b. Give the coordinates of one point that is 4 units from point \( C \) in the x-direction. \( \square \) (Type an ordered pair.)