Page 1
Mathematics
Work Sheet
Name : Class :
Absent : Date :
Page 2
A Circle
Okay students, we are going to learn about a circle.
In here, you will have a experiment for a circle. Enjoy your journey.
First, lets we determine the circumference of circle.
Step to determine the circumference of circle:
1.
Make some
circles into the cartoon paper. Lets see the figure I.
Radius is 1 cm Radius
is 2 cm Radius
is 3 cm
Source of image: http://ayobelajarmatematikaa.wordpress.com/2012/02/12/rumus-luas-dan-keliling-bangun-datar/
2.
Measure the
circumference of each the circle. You can use some thread to measure them.
You
can start from a point P end at the same point P.
3. Measure
the length of each strand of thread with a ruler. Write your answer into the
table I.
4. The
length of each strand is the length of each circles’ circumferences.
Second,
lets’ determine the diameter and circumference of a can’s base. You can use a
step:
1. Duplicate
the circle of the can’s base on a piece of paper.
2. Crop the duplicate of the can.
3. The cropped
piece of paper is a circle shape
4.
Fold
the circle duplicate so that the perimeter of circle is exactly covered each
other. The crease line acts as the diameter of circle.
Fold
the circle duplicate so that the perimeter of circle is exactly covered each
other. The crease line acts as the diameter of circle.
5.
To determine the
circumference of circle, you can use step like the first step. Write your
result into table I.
Third, please write your result on the table I.
Third, please write your result on the table I.
Circle
|
Diameter
|
Circumference
|
Circumference/Diameter
|
r = 1 cm
r = 2 cm
r = 3 cm
radius of can
|
- You can use a calculator to complete the table (the 4th column)
- Find the average value of the ratio of (Circumference/Diameter) rounded to two decimal places.
- Write your conclusion.
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