\begin{tabular}{|l|}\hline \begin{tabular}{l} a. \( \begin{array}{l}\text { La recta que pasa por ios puntos } \\ (3,-3) \text { y }(4,0) \text { tiene por ecuación } \\ y=-2 x+9\end{array} \) \\ \hline b. La ecuación de la recta que pasa por \\ \( (-4,-2) \) y \( (10,0) \) es \( y=2 x+10 \)\end{tabular} \\ \hline c. La recta cuya ecuación es \\ \( \begin{array}{l}y=-6 \\ (-3,6) y \\ (-5,6)\end{array} \) \\ \hline d. \( \begin{array}{l}\text { La ecuación de la recta que pasa por } \\ (0,-3) y \\ (2 .-2) \text { es } y=\frac{1}{2} x-3\end{array} \) \\ \hline\end{tabular}

(a) Find the area of the \( \triangle P Q R \). (b) Find \( Q M \). 9. In the given figure \( D L \) and \( B M \) are the heights corresponding to sides \( A B \) and \( A D \) respectively of parallelogram \( A B C D \). If the area of parallelogram is \( 300 \mathrm{~cm}^{2}, A B=30 \mathrm{~cm} \) and \( A D=20 \mathrm{~cm} \). Find the length of \( B M \) and \( D L \).

3] (a) If the distance between the point \( (a, 7) \) and the point \( (0,-5) \) equals 13 length units find the value of a

lunghezza della circonferenza di raggio maggiore? \[ [\approx 38,81 \mathrm{~m}] \] La somma dei raggi di due circonferenze misura 15 cm e uno è i \( \frac{2}{3} \) dell'altro. Determina la lunghez- za delle due circonferenze. \[ [12 \pi \mathrm{~cm} \approx 37,68 \mathrm{~cm} \text { e } 18 \pi \mathrm{~cm} \approx 56,52 \mathrm{~cm}] \]

2] \( A B C D \) is aparallelogram, \( m(\angle A)+m(\angle C)=200^{\circ} \), then \( m(\angle B)=\ldots(50,80,100,160) \)

47. The measure, in degrees, of each interior angle of a regular polygon with \( n \) sides is given by \( \frac{(n-2) \mid 80}{n} \). What is the sum of the measures of the interior angles of a regular octagon?