Area of the triangle is 1/2 bh
base is 8
half base is 4
drop a perpendicular on the base. you get 2 right angle triangles. Use Pythagoras rule to find the height.
h=
=3
so area of the triangle= 1/2 X 8 X 3= 12cm2
since there are 2 it will be=2X12=24cm2
Yes you don't take the top cuz it's open..
lol...Thank You