Question
The diameter ' of the circle below is 29 cm. What is the circumference of the circle? Give your answer in centimetres (cm) to 1 d.p. circumference=square cm Not drawn accurately
Answer
4
(311 Votes)
Eugenie
Master · Tutor for 5 years
Answer
Now, the numerical value of Pi is approximately 3.14159. However, to make the calculation manageable, we will round off Pi up to three numerical places after the decimal which makes Pi approximately 3.142. Hence after multiplication ###
.Hence, the circumference of the circle, rounded off to 1 d.p is approximately
, The Circumference
(to 1 decimal place)
Explanation
## Step 1: Understanding the problemWe are given the diameter of a circle and we need to find its circumference. The relationship between these two quantities in a circle is expressed using the formula
, where
is the circumference of a circle and
its diameter.## Step 2: Substituting the given values into the formulaWe are given the diameter of the circle
. Hence, by substituting this given value into its circumference formula
,###
.## Step 3: Computing the CircumferenceBy multiplying
by
we will get the circumference of the circle in 1 d.p.