Areas of Rectangles, Squares, Circles,

Parallelograms, Triangles and Trapezoids

By: Nicholas Currie, Patrick Ludemann and Nicholas Woo

In order to calculate the area of a rectangle you use the formula length times width is equal to area.

Rectangles

l= 20cm

w= 12cm

lw= 20 x 12A= 240cm2

To find the area of a square you use the formula side2 is equal area.

Square

s=12cm

12 2

A= 144

To find the area of a circle you do the formula Pi x radius 2.

Circle

5

P= 3.14A= π5 2

A= 78.5

To find the area of a parallelogram use the formula Area equals base x height.

Parallelograms

b=10cm

h=5cm

A=bhA=10(5)A=50cm2

To find the are of a triangle use the formula Area equals base x height.

Triangle

h=4cm

b=9cm

To find the area of a trapezoid use the formula Area equals half of base a +base b x height.

Trapezoids

a=10cm

h=7cm

b=19cm

Credits