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

The midpoint between two points is \( \{1,5\rangle \). One of those points is \( \{8,3\rangle \), find the other.

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

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

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?