216
Step-by-step explanation:
Volume of prism = BH
B -> Base area
Area of base:
b = 10 mi
h = 3.6mi
Area of the triangular base =
           Â
H = 12 mi
Volume of prism = 18 * 12 = 216 Â cubic mi
answer: they are supplementary angles
step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees