Examples: Area Related to Circles- 1 Video Lecture - Class 10

hello friends this video on areas
related to circles part three is brought
you by exam fear calm no more fear from
exam before watching this video please
make sure that you have watched part 1
and part 2 let's take for example the
portion say Archie target Marvin's five
scoring region from Center words gold
red blue black and why the diameter of
the region representing board is 21
this guy is 21 binder so radius of the
board is 21 by to ten point nine little
ratings of this and each other man is
ten point five into the white this guy
is ten
this guy is ten this guy is ten and this
guy also there correct so let me
represent this way first find the radius
of all so radius of gold will be equal
to diameter is given twenty one
centimeter per volt varies will be 21 by
two that is ten point five centimeter
then radius of board is ten point minus
similarly it is mine the radius of the
next is red this will be ten point five
thrust this guy x dot then one time
correct this will be ten point five plus
ten point five it is twenty one city so
we have radius of radar school similarly
radius of blue this will be the radius
of red plus ten point five because this
is 10 point type everything a statement
frame all the extra regions is ten point
five centimeter wide so blue will be
twenty one plus ten point five this 3125
so I have ready so blue
similarly at the radius of black that
will become
blue last 10:25 that will be 42 second
and similarly radius of white will be
radius of black that is 42 plus 10 min
faith that is 52 point 5 centimeter so I
have all the radius first it is done now
I have to find what the area of all the
Dixons area of world is very simple this
is just a circle we have the radius we
can find the area PI R square correct
this here so area of world if you see is
very simple area of gold be PI there it
is a whole square that is nothing but PI
into 10.5 square and this if you solve
this comes out to be three forty six
point five and the unit will be
centimeters
so area of world is done very simply now
challenge comes for area of meanness
other one the blue the red the black
goes that so let me find area in your
favor easier for it will be what you see
area of red is nothing but you take the
whole circle the red circle right -
what's up that is area red circle -
earlier voter correct see area of this
red is nothing word you doing the whole
area this big area this area and from
this you subtract the area of bolt
shudder she will get this pot the red
path
the red band actually correct so this
will be safe here one area of red
circles and they went by our red square
- area of gold is nothing but PI R whole
square correct this will come under the
word pi into this is 21 our red square
of Phi equal to I square minus PI into
ten point five square correct and if you
solve this this comes out to be one zero
three nine one zero three nine point
five centimeter square doesn't be the
area of the rectum
very simple you just saw this is a
businessman similarly if you want to
find that suppose in your blue area of
move and move time between uses both a
key area of bloom and just be nothing
but area of blue circle - area of red
circle
correct cheeps on here you take the
whole this area of the view civility to
all this from this is a bribe this red
circle red circle complete red circle
that you be nothing word PI R mu square
minus PI R red put the value the
negatives that is PI R rule your thirty
one point five thirty one point five
square minus R red will be twenty one
five
similarly for the plant
same thing here your black man will be
in your black circle - in your blue
circle in the answer in your white man
will be area of white selfie - in your
you do this link and you get danced very
simple same approach just keep on
booking the values solve it and get nice
just understand the concept the concept
here is the moment you want to find the
area of red man
you can find the area of red circle -
area good then you supposed to find a
area of blue band you to find the area
of blue circle - area red circle
similarly for black man area of black
circle - area of Lucifer
sorry thank you
visit exam viacom to watch free
education videos try free online tests
get the best quality study materials
study from the best tutors and mentors
and much more thanks and screen