Question

The diameter of a circular glass lens is 8.7 centimeters. Paige uses the edge of the lens to trace a circle on a sheet of paper. What is the estimated circumference of the circle?
1. 13.659 centimeters
2. 27.318 centimeters
3. 54.636 centimeters
4. 237.6666 centimeters

Answer 1

You need to multiply 8.7 by 3.14.You should get 27.318

Answer 2

Answer: 2.  27.318 centimeters

Step-by-step explanation:

We know that the circumference of a circle is given by :-

$C=\pi d$, where d is the diameter of the circle.

Now, the diameter of the given circle = 8.7 centimeters

Therefore, the circumference of the circle will be :-

$C=\pi 8.7$

Since, the estimated value of $\pi=3.14$,

Therefore, $C\approx(3.14) 8.7=27.318\ \text{centimeters}$

Hence, the estimated  circumference = 27.318 centimeters.