A 12-foot flagpole casts a nine-foot shadow. What is the measure from the top of the shadow to the top of the flag pole?

15
21
3
6

15

To find the measure from the top of the shadow to the top of the flagpole, we need to add the length of the shadow to the height of the flagpole.

Given that the flagpole casts a nine-foot shadow, we add nine feet to the height of the flagpole, which is 12 feet.

So, the measure from the top of the shadow to the top of the flagpole is 12 feet + 9 feet = 21 feet.

Therefore, the correct answer is 21.

You have a scaled-up 3-4-5 right triangle.