2006-11-22 01:24:12 · 13 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
A one-dimensional figure is a line, and has LENGTH.
A two-dimensional figure has two dimensions (usually width and length) and has AREA.
A three-dimensional figure often has three dimensions (such as width, length, and height) and has VOLUME.
2006-11-22 01:30:51 · answer #1 · answered by ? 6 · 0⤊ 0⤋
Area is defined as the amount of region enclosed by the boundaries of a simple, closed, plane figure. You have formulas for finding the area of some figures. Area of :
Triangle = (base)*(height)*(1/2)
Square = (side)*(side)
Rectangle = (Length)*(Breadth)
Circle = (pi)*(radius)^2
Parallelogram = (base)*(height)
Trapezoid = (1/2)*(sum of the lengths of the parallel sides)*(Height)
Rhombus = (1/2)*(Product of diagonals)
All the above are just basic formulas. More complex formulas or more novel methods to find areas will be taught to you in the future.
There is yet another formula for finding the area of a triangle, when height cannot be determined. It is called Hero's formula. Here's the derivation:
Let the sides of the triangle be 'a', 'b' and 'c'
The perimeter = a + b + c
Semi-perimeter = (a + b + c)/2
Let the Semi-perimeter be 's'
Area of triangle = Square root of[(s)(s-a)(s-b)(s-c)]
2006-11-22 03:30:22 · answer #2 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋
It means the surface area or how much the object covers inside its boundaries. eg the surface area of a rectangle is found by multipling the length by the width and the answer is expressed in square feet or square inches or square metres etc.
2006-11-22 01:37:55 · answer #3 · answered by Daddybear 7 · 0⤊ 0⤋
The amount of 2D space inside something- if its 3D then its called volume instead. Example...If u have a rectangle with length 5cm & width 3cm, u do lengthxwidth to calculate the area. 5x3=15, piece of cake
2006-11-22 09:09:28 · answer #4 · answered by Just me 5 · 0⤊ 0⤋
the product of widthx length= area^2
2006-11-22 03:13:24 · answer #5 · answered by sara 2 · 0⤊ 0⤋
The amount of floor space something covers. For a rectangle it's the length mutiplied by the width. For a circle is its radius squared multiplied by pi.
2006-11-22 01:40:51 · answer #6 · answered by ribble_girl 2 · 0⤊ 0⤋
area is a measure of 2 dimensional space generally denoted in units squared and calculated as length(or equivalent) x width(or equivalent)
2006-11-22 01:34:21 · answer #7 · answered by Da Funk 5 · 0⤊ 0⤋
it is the length multiplied by the width and givng thus the "square" measurement of the area. 2cm x 6cm =12 cm2
2006-11-22 01:29:33 · answer #8 · answered by Anonymous · 0⤊ 0⤋
A roughly bounded part of the space on a surface
2006-11-22 01:29:52 · answer #9 · answered by 7 · 0⤊ 0⤋
The amount of two-dimensional space.
2006-11-22 01:27:26 · answer #10 · answered by dogwaterhome 2 · 0⤊ 0⤋