the right angle is equal to 180 and the straight angle is equal to 90, therefore
[tex]5t+6+90+49=180[/tex]
and solve for t
[tex]\begin{gathered} 5t+145=180 \\ 5t+145-145=180-145 \\ 5t=35 \\ \frac{5t}{5}=\frac{35}{5} \\ t=7 \end{gathered}[/tex]
angle 1 = 5(7) + 6 = 35 +6 = 41°
angle 2 = 90°
angle 3 = 49°
