Area Problems
A circle and a square have same area. The ratio of the side of the square and the radius of the circle is?

? : 1
1 : ?
?? : 1
1 : ??

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Area Problems
The length of the diagonal of a rhombus is 80% of the length of the other diagonal, Then the area of the rhombus is how many times the square of the length of the longer diagonal?

1/4
4/5
3/4
2/5

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