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Scale Factor Area Quiz

Change the blue rectangle to a rectangle that has area 12. Change the scale factor so that the area of the green rectangle is 48.
Change the blue rectangle to a parallelogram that has area 28. Change the scale factor so that the green parallelogram has area 7.
Change the blue rectangle to a kite that has area 10. Set the scale factor so that the green kite 9 times as big.

What is the relationship between the area of the original shape (blue), the scale factor and the area of the new shape (green)?

In this quiz 8 shapes have been enlarged. Calculate the area of the enlarged shape. Only press 'start over' if you mean to do the quiz again.