two-dimensional shape

of a circular area; perimeter: the

circumference of a circle.

all points at a given distance

from a point within it called the

center

of opposite sides parallel to

each other

object, or piece: a triangle of land.

mathworld.wolfram.com

substance or object

 occupies, or that is enclosed 

within a container.

parrallel planes

having two parallel

and two nonparallel sides.

sides of equal length

through a fixed plane

curve not containing the point, consisting

of two equal sections joined at a vertex.

bounded by six quadrilateral faces, whose polyhedral

graph is the same as that of a cube

by the revolution

 of a semicircle about its 

diameter; a round body

 whose surfaces at all points 

equidistant from the center

having three sides

and three angles

any regular shape that can be 

2-dimensional or 3-dimensional

-pi or 3.141592 times the diameter.

are 90 degrees or less

Obtuse Triangle: all angles are

more than 90 degrees.

you do C=3.14*d

or C=2(3.14)d

to find the area of a circle

you do (3.14)r^2

D=diameter 

C=circumfernce

PERIMETER:add up the the lengths of the sides or 4x

http://www.coolmath.com/reference/squares.html

you multiply the base times the height 

and because it is a triangle you have to 

make a line in the middle of the triangle 

to measure the height. To find the area of a triangle you do 1/2 of the base times the height.

a parallelogram you do

Side1+Side1+Side2+Side2=perimeter

to find the area of a parrallelogram

you do Side1*Side1*Side2*Side2=area

of rectangle.

life by little kids toys

that they play with a box

or (cube) tv is a cube that is

used and also a dice is used in

everyday life

VOLUME: l*w*H

http://math.about.com/od/formulas/ss/surfaceareavol_4.htm

volume: (4/3)*3.14*10^3

cylinder you do

2*3.14*r*h

to find the volume you do

3.14*r^2*h