Casio fx-570MS - Manual (Page 8)

– 5 –
Circles and Sectors
Determine, up to one decimal place, the circumference and
the area of a circle with a radius of 8 cm.
(Radius = r)
Circumference of a circle: l = 2
π r
Area of a circle: S =
π r 2
1 .
Enter the COMP Mode.
F 1
2 .
Press the F key a number of times until 1 (Fix1) is specified as the fixed number of decimal
places.
F • • • 1 (Fix) 1 ]
3 .
Calculate the circumference of the circle.
2 A x - 8 =
Result: 50.3
The circumference of the circle is approximately 50.3 cm.
4 .
Calculate the area.
A x - 8 K =
Result: 201.1
The area is approximately 201.1 cm 2 .
Example 1 Example 1
Explanation Explanation
Operation
FIX
FIX
r
l