In the figure on the right, the side-length of the smaller square is 4 . The four arcs are four semi-circles. Each side of square ABCD is tangent to one of the semi-circles. The area of ABCD is
A.
32
B.
36
C.
48
D.
64
Exam No：2018 First Round Grade 5 Year：2018 Question No：31
Answer:
D
Knowledge points:
G5 - Geometry - Area (Composite Shapes)
Solution:
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