Casio fx-570MS - Manual (Page 11)

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Square Roots
Example 2 Example 2
Operation
Determine the length of one side of a square whose area is
equal to that of a circle with a radius of 10 cm.
• First, determine the area of the circle.
• If the length of one side of a square is l, the area of the
square is l 2 . This means that the length of one side of a
square with the same area as the above circle can be
determined by calculating the square root of the area.
1 .
Enter the COMP Mode.
F 1
2 .
First, determine the area of the circle with a 10cm radius.
A x - 10 K =
Result: S = 314.1592654
3 .
Calculate the square root of the area.
L =
Result: l = S = 17.72453851
The above indicates that the length of one side of a square whose area is equal to that of a circle
with a radius of 10 cm is 17.7 cm.
Explanation Explanation
S S
r
=
l