Minus A plus 6 a ncert solution class 9

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:

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm