A geometry problem by Jia Quan Ng
A circle with a radius of cm is covering a square with cm at each side. The circle is in the middle of the square. What is the amount of area that the circle is not covering the square in ? (Round off the number to the nearest tens and write the number only)
The answer is 70.
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A
=
a
r
e
a
o
f
t
h
e
s
q
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a
r
e
−
a
r
e
a
o
f
t
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c
i
r
c
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=
1
0
2
−
π
(
3
2
)
=
1
0
0
−
9
π
=
7
0