Euler's formula, v – e + f = 2 relates the number of vertices v, the number of edges e, and the number of faces f of a polyhedron. how many faces does a polyhedron with 5 vertices and 8 edges have?

given that triangle abc is transformed two times to get triangle

a"b"c"

first abc is transformed in to a'b'c' as follows:

the coordinates of a are (1,-1) and transformed into a'(-1,1)

similarly b (4,-2) became b'(-4,2) and

c(7,-2) became c'(-7,2)

i.e. (x,y) becomes (-x,-y)

this is nothing but reflection about a point here origin.

thus first transformation is reflection on the origin.

next is exactly shifting 3 units down

source:

4x and 6y

im not sure though