Math / Matematikë 1. Given three angles with measures \( a, b \) and \( c \). Known that \( a \) and \( b \) are complementary, \( a \) and \( c \) are supplementary. If \( a=20^{\circ} \) then what is the sum of \( b \) and c?

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?

Si \( P=(1,1) \) y \( Q=(2,2) \), la magnitud \( (|\overrightarrow{P Q}|) \) y dirección \( (\theta) \) del vector \( \overrightarrow{P Q} \) son, respectivamente

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.

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