Question

please help?
In the figure, ABC is congruent to ADC . If the square ABCD is dilated by a factor of 2 to form A'B'C'D', what is the ratio of the area of A'B'C'D' to the area of ABCD?

Answer 1

2 : 1



3 : 1



4 : 1



5 : 1

Answer 2

i think 2:1 but im not sure

Answer 3

@mathmate

Answer 4

@welshfella

Answer 5

can someone please help

Answer 6

i think it is 2:1

Answer 7

Given dilation factor is 2, so if AB=x, then A'B'=2*x=2x

Answer 8

Can you find the area of square A'B'C'D' (in terms of x) from the measurement (A'B'=2x)

Answer 9

its either 2:1 or 4:1

Answer 10

Please don't guess. In math, we are not supposed to guess. We need to work it out to get the right answer.
So please tag me when you're ready to work it out together.