1.                                The formula for the area of a trapezoid -  

       P=(a+b)×h/2

b-side

h-height

2. Pythagorean theorem - 

      a2+b2=c2

b-side

c- hypotenuse

3.

The formula for the area of a circle - 

A = mr2

A-side

r-radius

m-number pi (3.14)

4.

The formula for the area of a triangle 

        P = a x h/2

h-height

a-side 

P-area

5.

The formula for the area of a parallelogram  

     P = a x a

P-area

a-side

h-height

6.

The formula for the area of a rectangle 

     P = a x b

P-area

a-side

b-side

7.

The formula for the area and volume of a cube:

P =6a2    V   =a3

P-area

a-side

V-volume

8.

Formula for the area of a rhombus :

                                 P = e x  f/2

P-area

e-diagonals

f-diagonals

9.

5.The formula for the area of a square 

         P = a x h/2