Answer:

Step-by-step explanation:
we know that
The lateral area of the figure is given by

where
P is the perimeter of the base (larger faces)
h is the height
Find the perimeter of the base P

we have

substitute in the formula of lateral area

The answer is b because it goes down .89 every time
1) The height of this tree is 3 because North + south = height. The width will be 7 because east + west = width. Plugging this in to the perimeter formula:
2(3) + 2(7)
6 + 14
20!
The height would be 7cm because the area of the base (the triangle face) is 20cm². You would then divide the volume by the area of the base to get the height. 140/20=7cm
Hope this helped!