The expression below gives the area of a triangle where b is the base of the triangle and h is the height of the triangle. what is the area of a triangle with a base of 7 cm, and a height of 4 cm?

14 cm²

Step-by-step explanation:

The area (A) of a triangle is calculated using the formula

A = bh

here b = 7 and h = 4, thus

A = 0.5 × 7 × 4 = 14 cm²

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:

26

step-by-step explanation: