Given:
The preimage and image of a triangle in the given figure.
To find:
The dilation scale factor.
Solution:
From the given figure it is clear that the vertices of the triangle ABC are A(-2,-2), B(-1,2) and C(2,1).
The vertices of the triangle A'B'C' are A'(-4,-4), B'(-2,4) and C'(4,2).
If a figure is dilated by factor K with (0,0) as the center of dilation, then

Let the scale factor be K, then the image of point A is:


From the given figure it is clear that the image of point A is A'(-4,-4).

On comparing both sides, we get



Therefore, the dilation scale factor is 2.
Answer:
x = 19
Step-by-step explanation:
180-123 = 57
x = 57/3
x = 19
Angle 4 + angle 1 must equal 180.
angle 4 = 65
180 - 65 = 115 degrees
Answer:
angle 2 is 85
Step-by-step explanation:
since its facing the 85
Vertical because the line passed through -4 on the x axis