Octagon from rectangle

From tablecloth rectangular shape with dimensions of 4 dm and 8 dm we cuts down the corners in the shape of isosceles triangles. It thus formed an octagon with area 26 dm2. How many dm2 we cuts down?

Result

x =  6 dm2

Solution:

Solution in text x =







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To solve this example are needed these knowledge from mathematics:

See also our trigonometric triangle calculator.

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