Question

me ajudem!por favor!!

Answer 1

$a) x + 40° + 90° = 180° \\ x = 180° -40° - 90° \\ x =50°$

$b) 30° + 82° + x = 180° \\ x = 180° -30° -82° \\ x= 68°$

$c) x + x + 90° = 180° \\ 2x +90°=180° \\ 2x=180°-90° \\ 2x=90° \\ x=90°/2 \\ x=45°$

$d) x+20°+20°=180° \\ x=180°-40° \\ x=140°$

$e)x+10°+90°=180° \\ x=180°-100° \\ x=80°$