Question

What is the exact area of a circular courtyard with a radius of 22 ft?


A.


1936π ft²


B.


484π ft²


C.


44π ft²


D.


22π ft²

Answer 1

do you know formula for area of a circle ?

Answer 2

a=π•r^2
this is the formula

Answer 3

yes so just substitute the added dates for r and pi and will get the right answer sure easy

Answer 4

first plug in the in the 22 for r and you should get the answer @CUTIEGIRL01 very easy

Answer 5

is the answer is b 484

Answer 6

@Asevilla5

Answer 7

correct @CUTIEGIRL01

Answer 8

Which expression can be used to find the area of a circle with a diameter of 40 cm?


A.


π · 20


B.


π · 40


C.


π · 202


D.


π · 402

Answer 9

so than the diameter is 40 how many will be the radius ?

Answer 10

area of a circle is π * r^2
The radius is half the diameter so the radius in this case is 20 cm.
So r = 20
π * 20^2 = π · 402

Answer 11

the answer is 402

Answer 12

good job

Answer 13

40 square

Answer 14

the 2 is the squared sign on c and d so it is either a 20 b 40 c 20 squared or c 40 squared

Answer 15

@Asevilla5

Answer 16

how you have got 402 above like result for area ?

Answer 17

than the radius is 20 what is 40/2

Answer 18

is the answer 20

Answer 19

20 is just the lenght of radius

Answer 20

so this mean pir^2 =pi*20^2

Answer 21

or not ?

Answer 22

so the answer is 40

Answer 23

why ? 20^2 = ?

Answer 24

what does the ^ sign mean

Answer 25

exponent

20 on power 2

Answer 26

so how do i find the answer

Answer 27

20^2 =400

Answer 28

but that is not a choice

Answer 29

A = pi * r ^2
r = diameter/2 = 40/2 = 20
leave pi as pi
A = pi * 20 ^2
option c

Answer 30

thank you all for your help