Morgan0210 wrote:
Work out surface area of toblerone
Each piece (triangle) is 4cm width 4cm height - 1cm depth
Their is 12pieces
So please correct me if wrong triangle 4x4=16 divide by 2 so surface area of triangle front and end is 16 then sides are 4x12=48 x3 = 144 + 16= 160
Does this sound correct?
The sides are not all 4cm long according to this, though - the base is 4cm and the height is 4cm, which makes the two other sides 4.472cm (possibly rounded to 4.5cm here)
B is the length of the base: 4
A is the altitude (height): 4
L is the length of either of the other two sides
L = Square root of ((A squared) plus (half B, squared))
= Square root of (16 + 4)
(Sorry, can't work out how to do the notation).
So the perimeter of each face is B + L1 + L2 (4 + 4.5 + 4.5) = 13cm, not 12cm.
Or 12.944cm...