Answer:
80
Step-by-step explanation:
every triangle adds up to 180 sort of, in this case, turn 4 into 40. 40+20=60 so add 80 to be 180!!!
if itis perimeter add all sides
if it is área multiply
Answer:3
48x+13.8
i think you stack them and cross multiply.
Volume= lxwxh
12 x 10 x 6= C
720 ft
