how do u find an area of a shape ?

Question

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Answer 1

It depends on what shape you are trying to get area on.
Go to this website it will list all equations that you need. Then you just plug in the numbers.

http://en.wikipedia.org/wiki/Areas

Answer 2

A shape composed of straight lines can be decomposed into a set of triangles. Each of those triangles can then be divided into 2 right triangles. The area of a right triangle is 0.5 * b * h, where b and h are the sides that comprise the right angle.

So now, you just add up the areas of each triangle.

There is such an equation to determine the area of an irregular polygon. You'd feed in all the angles and vertices (sides) to the formula. I don't have it though.

A shape not composed of straight lines, is more involved. One way is to make the curve into many small triangles whose edges approximate the curve. As the triangles become smaller and smaller, the more accurate the measurement will be. Using integral calculus the size of the triangles goes to zero and you can have an exact solution. But for calculus to work, you'd have to first know the algebraic function that represents the curve.

Another solution is to create the shape, add a 1 inch lip around it and fill it up. Then drain it and measure how many cubic inches of water you have. That will be the area of the shape

Answer 3

It depends on the shape. Square: side x side= area. Rectangle: length x width= area. Triangle: 1/2 base x height= area. There are many more shapes. Any specific shapes for which you would like to calculate the area?

Answer 4

1. make a Photocopy of the Shape (enlarge if you need)
2. use a scale to weigh the paper
3. use scissors to cut out the shape
4. use the same scale to weigh the shape
5. find the fraction of the weight of the shape to the weight of the paper
6. Multiply this fraction by the area of the original paper

That will a good estimate of the area for any shape.

Answer 5

well it depends on what shape you are trying to find the area of
there are formulas for finding the area of regular shapes such as
circles-pi x radius^2
square- length x width
triangle-1/2 x base x height
trapezoid-1/2 x (base1 + base2) x height
parallelogram- base x height
pentagon, hexagon,heptagon,octacon...-area=1/2 x apothem (perpendicular bisector of one side to the center) x perimeter

(the last formula will work for all regular polygons)

Answer 6

If you have an irregular shape, you can place it down on a grid of squares, like graph paper and count the squares. The squares of course need to be in the measurement you are using.

Answer 7

For the area of a curve on a coordinate plane, find the integral under the curve.

Answer 8

smart *** u gotta break da shape into similar forms like triangle, square and rectangles. da area of a triangle is .5 * base * height. da area of a square is side * side. da area of a rectangle is length * width. find the area of each simplified shape and add it up.

Answer 9

First, area of what shape?

Answer 10

it depends on the shape for a quadrilateral u do base x height. for a triangle you do base x height then divide it by 2. wut shape do u need to find the area of?