Round to nearest tenth if needed

find the measure of y

Step-by-step explanation:

ΔABC and ΔDAC are similar. Therefore the corresponding sides are in proportion:

We have

Substitute:

              cross multiply

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.