if you dont know make an account
you would find the area of each side and then add them together
Please try the suggested link. Finding the area of a 12 sided figure isn't easy, but doable.
Firstly, all quadrilaterals are four sided. That is a the definition of a quadrilateral - a four sided figure. One way is to find the area of each half (i.e. two triangles) and add them together. The area of a triangle is half the length of the base times the height.
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To find the area, first divide the shape into regular, simple shapes. Then use formulas to find the area of the smaller, regular shapes. Lastly, add up all the smaller areas to find the area of the original shape.
30
15
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Area of plane figure
This figure is a regular 12-sided polygon. Find m<4
To find the area of the remaining figure, subtract the area of the removed portion from the total area of the original figure.