What is the area of a
triangle with a base of
55 cm and a height of
78 cm?

2145

Step-by-step explanation:

To find the area of a triangle you use the equation Height x Base divided by 2

so you would do 55 multiplied by 78 which would get you 4290

then you would divide  it by 2 to get 2145

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

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