5. Prove that \( B C=2 M N \). Convince a skeptic.

Graph the line containing the point \( P \) and having slope \( m \). \( P=(-6,3) ; m=0 \)

Si \( P=(1,-1) \) y \( Q=(\sqrt{2},-1) \), la magnitud del vector \( \overrightarrow{P Q} \) es

Draw a graph of the line that contains the given point and has the given slope. \( (0,1) ; m=-3 \)

5. Em um polígono, a razão entre a soma das medidas dos ângulos internos e a soma das medidas dos ângulos externos é igual a \( \frac{7}{2} \). Quantos lados tem esse polígono?

Draw a graph of the line that contains the given point and has the given slope. \( (-5,0) ; m=\frac{1}{5} \)