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\[\Huge{\color{gold}{\star \star \star}\color{red}{\text{Plane Geometry}}}\]
\[ \underline {ANGLE}:An \ angle \ is \ formed \ by \ two \ lines \ or \ line \ segments \ intersecting \ at \ a \ point. \]\[The \ point \ of \ intersection \ is \ called \ vertex .Unit \ of \ Angle \ is \ taken \ as\ degrees.\]\[Angle \ is \ obtained \ by \ intersection \ of \ two \ lines \ AB \ and \ BC \ is \ denoted \ by \ < ABC. \]\[We \ can \ also \ write \ **
**

\[TYPES \ OF \ ANGLES:\]|dw:1357729201753:dw|

\[\underline {2}:Sum \ of \ all \ angles \ about \ a \ point \ is \ 360 ^0 \]|dw:1357729894167:dw|

\[\Huge --- \text{END TO ANGLES}---\]

\[\underline{3}:Exterior \ angles \ is \ always \ equal \ t o \ the \ s um \ of \ opposite \ interior \ angl e.\]\[e.g.

8:Perimeter:Sum of the sides of the triangle is called perimeter.

\[\Huge --- \text{END TO TRIANGLES}---\]

|dw:1357735551081:dw|
So,
\[\huge\ Area=L \times W\] \[\huge\ Perimeter=2(L+W) \]

\[\Huge --- \text{END TO RECTANGLE}---\]

|dw:1357736723318:dw|

\[\Huge --- \text{END TO SQUARE}---\]

CENTRAL ANGLE: An angle formed by two diff radii at centre is called central angle.In the figure

CIRCUMFERENCE:Boundary of a circle is called circumference.

\[\huge\ C= \pi . d\]
\[(As \ d=2r)\]
\[\huge\ C=2 \pi r\]

AREA OF CIRCLE:
Area of circle is given by the formula.
\[\huge\ A= \pi r^2\]

\[\Huge{\color{red}{{THE Da \space END{\ddot{\smile}}}}}\]

For definitions 5 and 6 under Angles you should spell out supplementary and complementary.

Sorry dude.

hey, Really APPRECIATE you for the method of sharing Ideas...EXCELLENT JOB....HBA!!

Thanks dude.

>>!!

Thanks a lot :)

you did an amazing job hba

Thank you :)

that was very informative

Thanks :)

this will help a lot of people who are starting geometry

good job by the way

very useful keep it up.

Thanks :)

guys i toght him that jk :D

Haha lol :P

how long did tht take

I don't know :P

i say 40min tops

hahaha tu kia hoa math bato se hi seekhi jati ha :p

?????

tnx
Please comment on my activity

yeah it's informative:)

great work @hba

Thank you very much.
I am really sorry for not putting the heroen's formula though.

nice work :D

Thanks :)

yeah i toght him well XD

reaper534_ nice joke :D aha peace XD

Lol learn to spell first then teach others :P

hahahahah :D it ain english class

How did you know I don't know Geometry o.0?
n e wayz, bookmarked. great review!

Thanks :P

I just shared it with you :)