You need to break the shape up into different shapes. For example if you have a shape that is basically a triangle and a square merged together you will work out the squares area then the triangles area and add them together.
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All you have given is a rectangle which I presume encloses the composite shape. It is impossible to give the area of the composite shape other than to say it is less than or equal to 8 sq units. To work out the area of a composite shape, split it up into areas which you can work out (eg squares and rectangles) and sum the area of all the area.
There is no single formula, unless you consider the following:Sum(Area of each part of the composite shape calculated according to its bus-formula).
circle
A figure (or shape) that can be divided into more than one of the basic figures is said to be a composite figure (or shape).For example, figure ABCD is a composite figure as it consists of two basic figures. That is, a figure is formed by a rectangle and triangle as shown below.The area of a composite figure is calculated by dividing the composite figure into basic figures and then using the relevant area formula for each basic figure.Example 20Find the area of the following composite figure:Solution:The figure can be divided into a rectangle and triangle as shown below.So, the area of the composite figure is 216 cm2.
area is the outside of the shape, to get it, add all sides together. perimeter is the diagnal. i learnt that in 7th grade maths. :)