Respuesta :

chloe8668
Answer: h=9
3h° + 18° + 15h°=180°
18h+18=180
18h=180-18
18h=162°
h=162°/18
h=9

Answer:

9

Step-by-step explanation:

3h + 18 + 15h = 180   ( adjacent angles add up to 180 degrees).

`18h = 180 - 18 = 162

h = 162 / 18 = 9 (answer)