Question

Draw the dilation of triangle DEF by a scale factor of 2. What is the ratio of the area of the dilated figure to the area of the original figure?

Answer 1

In area calculations (be it circles, squares, triangles, etc.) if you increase the scale by 2, the area increases by 4 (or 2 squared).

Answer 2

Could you explain?

Answer 3

Basically it means you multiply each coordinate by 2.