Better Students Ask More Questions.
Calculate the circumference and area of the circle whose diameter = 14.
3 Answers | add yours
High School Teacher
We have the diameter d = 14
Then the radius of the circle (r) = d/2 = 7
The circumference (C) = 2*r*pi
= 44 unit>
The area (a) = Pi*r^2
= 154 square unit.
Posted by hala718 on August 2, 2010 at 7:47 AM (Answer #1)
The answer to this is that the area of the circle is 154 square units and the circumference is 44. Here is how to find this answer.
We know that the area of a circle is found by the equation
area = pi*r2 where r is the radius. The radius here is 7 because that is half of the diameter.
area = 3.14*7^2
area = 3.14*49
area = 153.86 or 154
We know that the circumference of a circle is found by the equation
circumference = 2*pi*r
So circumference = 2*3.14*7 = 43.96 or 44
Posted by pohnpei397 on August 2, 2010 at 7:49 AM (Answer #2)
Circumference of a circle = pi*diameter
Substituting the given value of diameter, and value of pi (22/7) in above equation:
Circumference = (22/7)*14 = 44
Area of a circle = [pi*(diameter)^2]/4
Substituting the given value of diameter, and value of pi in above equation:
Area = (22/7)(14^2)/4 = 154
Circumference = 44
Area = 154
Posted by krishna-agrawala on August 2, 2010 at 8:15 AM (Answer #3)
Join to answer this question
Join a community of thousands of dedicated teachers and students.