Question

Circumference:

Circumference:
LEARNING TASK 4. Solve the given problems
PROBLEM I. Veldora walked around the circular pool. The circular pool
has a diameter of 3 meters. What is the distance that Veldora has
walked?
Step 1 - Read and understand
What is asked in the problem?
What do you know of the problem?
Step 2 - Plan
What must be done to solve the problem?
Step 3 - Solve and answer
Carry out the plan & write the final answer.
Step 4 - Check
Is the answer correct?
PROBLEM 2. How much greater is the circumference of the circle with a
diameter of 12m than another circle with a radius of 5m?
Step 1 - Read and understand
What is asked in the problem?
What do you know of the problem?
Step 2 - Plan
What must be done to solve the problem?
Step 3 - Solve and answer
Carry out the plan & write the final answer
Step 4 - Check
Is the answer correct?
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Answer 1

9.42 m

6.28m

Explanation:

to determine the distance walked, calculate the circumference of the circular pool

circumference of a circle = πD

π = 3.14

D = diameter

3 x 3.14 = 9.42 m

Difference in circumference = π( diameter of bigger circle - diameter of smaller circle)

diameter of smaller circle = 5 x 2 = 10

the diameter is the straight line that passes through the centre of a circle and touches the two edges of the circle.

A radius is half of the diameter

3.14 x ( 12 - 10) = 6.28