0
Commit to memory
A = pi r^2
C = 2 pi r or pi d
NB 2r = d
This is elementary school maths.
Hence if d = 2r 8 , then r = 8/2 = 4
Hence
A = pi 4^2
A = 16 pi
pi is a constant at 3.141592....
A = 16*3.41592.... = 50.26554.... units^2
Still curious? Ask our experts.
Chat with our AI personalities
EzraFaith is not about having all the answers, but learning to ask the right questions.
Chat with Ezra
SteveKnowledge is a journey, you know? We'll get there.
Chat with Steve
RossEvery question is just a happy little opportunity.
Chat with Ross
Add your answer:
Earn +20 ptsQ: What is the area of a circle with a diameter of 8?
Write your answer...
Submit
Still have questions?
Continue Learning about Statistics
The diameter of a circle is 2.42 m Calculate its area in proper?
Area is 4.6 m2
What is the formula for the area of the circle given the diameter?
in place of r (radius) write d/2 where d is diameter
What is the radii of a circle?
The radius(radii is the plural) of the circle is half the distance of circle's diameter. The formula is r=(1/2)diameter.
What is the formula to get pi?
Take the circumference of a circle and divide it by the diameter of that circle: ∏=C/D
How do you find the diameter of a circle if you have the circumfrence?
divide by pi which is 3.1415927 and on and on
Trending Questions
What creates a temporary subset of records?
What is the strongest suit in cards?
2 examples how the theory of probability is applied in real life situations?
What is a listing of all possible outcomes of an experiment and the corresponding probability?
Does Correlation alone complicates causation?
How much does one tomato weigh o average?
What is a graph that is used to compare two similar kinds of data?
What is the probability of getting a red card from a deck of cards?
What type of variable shows the effect that an independent variable has on a subjects behavior?
Don collected the salary and monthly expenses of several employees Which line best models the data?
What is the estimated number of Christians in the US?
What does it mean if premolar is shaking with 10 year old kids?
Find the probability of selecting 3 science books and 4 math books from 8 science books and 9 math books The books are selected at random?
What is the purpose of the key in a bar graph?
If a set of data has 100 points and variance 4 then the standard deviation is?
How much does the average 13 year old boy wheigh?
What is probability of drawing a card that is red with an even number from a full deck of cards?
Is The probability that a gamete produced by a pea plant heterozygous for stem height Tt will contain the recessive allele 100 percent?
If the probability of an event is 0.42 then what is the probability of its component?
Why are bar graphs used for certain types of data?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.