P6 Math: Circle with a Square (2 identical isosceles triangles)

This is a circle question that also requires knowledge of triangles and squares.

The radius is not given but the area of the square or triangle is given.
Students will find it difficult to find the area of the circle due to the missing radius.


An oil drum cylinder has a circular base
but is a rectangle when viewed from the side


The question below will randomize with different numbers every hour. 
Copy below question down before making attempt.



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