Objectives: :
Objectives: At the end of the lesson, the students should be able to:
a. derive a formula in finding the circumference of a circle.
b. find the circumference if the diameter is given.
Motivation: :
Motivation: Give an example of things which are circular in shape.
EXAMPLES: :
EXAMPLES: Plate
Watches
Coin
Tire
Jewelry
Mirror
Wall clock
Slide 5:
Can we obtain the circumference of the given object?
Slide 6:
What is circumference?
Slide 7:
CIRCUMFERENCE
- is the distance around the circle.
Slide 8:
Circumference
Slide 9:
How can you find the circumference of a given object?
To find the circumference: :
To find the circumference: 1. Find the diameter.
2. Multiply the diameter to 3.1416 (?).
Generalization: :
Generalization: What is the formula in finding the circumference of a given circular object
Slide 12:
C = ?d
Example: :
Example: What is the circumference of a circle if the diameter is 5 cm?
Solution:
C = ?d
C = 3.1416 (5 cm.)
C = 15.708 cm.
E - N - D :
E - N - D Prepared by:
Erilyn C. Leonoras
Presented to:
Mr. Salvador Salazar
Instructor (Major 16)