Question

Z1 and Z2 are a linear pair and the mZ1 is 9 times the measure of Z2. Find mZ1.mZ1 =degrees

Answer 1

$\begin{gathered} Z_1,Z_2\text{ are linea pair so} \\ Z_1+Z_2=180 \\ 9x+x=180 \\ 10x=180 \\ x=18 \\ \angle Z_1=9x=9\times18=162^{\circ} \end{gathered}$