maths
posted by sandhya .
c) An equilateral triangle of side 3 cm each is given, How many triangles
can be made from this equilateral triangle of 1cm?

Your question contradicts itself unless the second sentence is reworded to something like:
"How many equilateral triangles of side 1cm can be made from the larger equilateral triangle?"
If that is your question, the answer is nine.