Question

Can someone tell me the answer to this

Answer 1

Answer:

7

Step-by-step explanation:

If ABCD is dilated by a scale factor of 1/2

then A'B'C'D' becomes half the size of ABCD

so if side D'A' is 3.5

Then D'A' = 1/2 DA

3.5 = 1/2 DA

DA = 7