Triangle ABC has vertices A(1,3), B(-2, -1) and C(3, -2).. If the triangle has a compostite transformation of a translation along (x-1, y-2) followed by a reflection in the y-axis, find the new points A", B", and C". Check the correct A" below. *

da freeck kinda math is this just drop out

step-by-step explanation:

you bought 31 v bucks

step-by-step explanation:

25+6=31

look at the picture.

1.

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

2.

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

3.

use pythagorean theorem:

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

substitute:

      cross multiply

      divide both sides by 3