【Haichuan Teahouse】Brain-teasing Series: The Confusing Windmills
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The area of the large square is 121, and the perimeter of the small square is 12. What is the area of the shaded region in the diagram?
It is said that by using an auxiliary selection method, it’s easy to get the answer
This post was last edited by wjl7212 on 2022-5-11 17:27: (3*4/2)*4=24
What if the square in the middle is not parallel? Is it a bit slanted instead?
What if the square in the middle is not parallel? Are they parallel?
That’s it; being deceived by all the colors and distractions
What happens if the inner square and the outer square are concentric but their sides are not parallel?
So one can’t use adult thinking to solve elementary school problems; adults have too many ideas.:
Look at my mistake – I mistook the perimeter of the small square in the middle for its area! Failing to get into university is probably caused by something like this. ;P;P
As long as the sides of the two squares are parallel, no auxiliary lines are needed; in all cases it’s 3*8