Find the area of a rhombus whose diagonals are 10 cm and 6 cm .

coordinate grid below. Find the coordinates of a fourth point o that the four points form the vertice of a rectangle.

7. A village with an actual area of \( 1 \mathrm{~km}^{2} \) is represented by an area of \( 4 \mathrm{~cm}^{2} \) on a map. (a) Express the scale of this map in the form \( 1: n \), where \( n \) is an integer.

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?

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

\( (-9,-1) \) and \( (12,14) \) Slope \( = \)