MATHS!!

Haishhhhh...

A moment ago, my sister asked me on how to calculate areas, 

But,,, i forgot the formulas. So, i have to search 4 it on the internet.

Hmm, I used to be good in maths. 

but now? 

Am i getting stupid or what..

Later, I went to search 4 my old mathematic books..

 Ya la..so that i can learn it again to improve n maintain my mathematic skill.

haha, but the funny thing is, i dont know where i keep them.

Of course la,, it has been 2 years since i left my high school.

So, instead of looking for them, i made some researches on the internet.

After a few clicks n typing, i finally found it!

Hmm, what to study? Algorithms? Ratios? Lines or areas ?,, yeah definitely areas!

So, here it is.

The formulas for calculating areas :

Triangle

Area = ½ x b × h

      

Square

Area  = a x a
a = lenght of side 

Parallelogram
Area = b x h
b = base
h = height

Trapezium
AREA = 1/2 ( a + b ) x h

                                           

Circle
Area = πr² 
Circumference=2πrr = radius