about math fair?

Question

Rep-tiles

Put 4 copies of Triangle A together to make the same shape, only bigger.

Put 4 Copies of triangle B together to make the same shape.only bigger.

you are allowed to turn the shapes upside down but the pieces are not allowed to overlap.....

that's my math fair puzzle

Answer 1

Triangle is an equilateral triaingle. Put two triangles so theieir bases are aligned. Then place third triangle so its base rests on the vertexes of the two triangles. This leaves a hole that the 4thh triangle when turned vertex down will fit exactly into. The result is an equilateral trianle 4 times the size of the individual triangles.

For part B do the same thing only with larger equilateral triangles.

Answer 2

cool=)
But it confuses me...I can't really solve it