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For shapes with three or fours straight sides, or regular shapes with more straight sides there are simple formulae.
For shapes of medium complexity you will need to break up the shape into simpler shapes and work out the perimeter and area for them and combine the results.
For a really complicated shape you can employ the analogue method using a lamina of uniform mass/area.
The perimeter of a really complicated shape may be impossible to find if it like a fractal but is not a proper fractal. You start off with what appears to be a simple shape and get the perimeter by adding together all the lengths. You then look at the shape under magnification and find that the sides are not exactly straight so you adjust for these wobbles. But when you increase the magnification, there are more wobbles to be adjusted for. and before you know it, you are on your way to a never-ending task!
What else can I help you with?
If perimetre of an irregular figure is known can you find its area?
Yes by working out individual sections and then adding them altogether.
How do you find the perimetre of a trapezium?
Add up together its 4 sides
How do you find the perimetre of 2 dimensional shapes?
You add the lengths of all the sides.
How do you find the area of 3 numbers?
You don't. You can find the area of geometric figures, not of numbers.
How do you find the area or perimeter of composite figures?
Not easily. You need to find the area or perimeter of the components and sum them.
How do we find the area of a figure?
Different figures have different rules to determine the area of it.
How do you find the perimetre of a shape?
You measure the sides of the shape you are finding the perimetre of and then add together the measurements. Then you have your answer. eg: 8cm x 7cm x 3cm x 5cm 8+7+3+5=23 answer is 23cm
How do you find area of an angle?
You cannot. The arms of an angle are of unspecified lengths and the shape is not closed so there is no finite area to find.
How do you find the area of a binomial?
A binomial is an algebraic expression. It does not have an area.
How does knowing the area of two-dimensional figures help you find the surface area of a three-dimensional shape?
The surface area of the 3-D figure will be the total of the areas of the 2-D figures.
How do you find the perimeter and area of irregular figures with irregular sizes of squares?
by subtracting
How do you find the surface area of similar figures?
To find the surface area of similar figures, you first need to determine the scale factor between the two figures. If the scale factor is ( k ), then the ratio of their surface areas will be ( k^2 ). Multiply the surface area of one figure by ( k^2 ) to find the surface area of the similar figure. This principle applies to any pair of similar shapes, regardless of their dimensions.
