Question

Leila has a number of identical equilateral triangle shaped tiles. How many must she put together in a row (edge to edge) to create a shape which has a perimeter ten times that of a single tile?

Answer = 28
Thanks to anyone who helps

Answer 1

draw it
the ends need 2 s
the top need n
the requirement is 10 * 3s = 30 s
so
2 s + n s = 30 s
n = 30 -2

Answer 2

I mean top and bottom need n

Answer 3

I can not understand what you mean for the S

Answer 4

Do you have a picture for that question if you have not had picture to draw how can people understand and how to draw this picture?