The square as shown has an area of 4 . Quarter-circles, centered at two opposite vertices of the square, overlap in the shaded region as shown. What is the area of the shaded region?
A.
2
B.
\(\pi\)
C.
\(\pi-1\)
D.
none of above
Exam No：2020-2021 Math League First Round Grades 8-9 Year：2021 Question No：18
Answer:
D
Knowledge points:
G8-9 - Geometry - Area Reasoning (Composite & Shaded Figures)
Solution:
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