Answer:

Step-by-step explanation:

Answer:
6. 5
7.2
8.6
9.-12
Step-by-step explanation:
Answer:
10 meters
Step-by-step explanation:
To calculate area of the triangle we multiply height with base and that divided by two
90 = (18 × w) ÷ 2
180 = 18w
w = 10 meters