6. a rotation maps a triangle with vertices a(3,1), b(-1,-1), and c(7,-2) to 4 a'b'c". what is the

length of b'c', to the nearest unit?

a) 4

b) 5

c) 8

d) 9

Option C.

Step-by-step explanation:

It is given that a rotation maps a triangle with vertices A(3,1), B(-1,-1), and C(7,-2) to A'B'C'.

We know that rotation is a rigid transformation. It means the size and shape of the figure remains same. In other words we can say that preimage and image are congruent.

The corresponding parts of congruent triangles are congruent.

Distance formula:

The distance of B(-1,-1), and C(7,-2) is

Approx to the nearest unit.

Therefore, the correct option is C.

answer: (1,3) and (-2,0) i think.

7

step-by-step explanation: