Answer:

Step-by-step explanation:
The window consists of a large square and 4 smaller triangles on the outside. The side length of this square is marked as 10, and therefore the area of this square is
.
The area of a triangle is given by
. Since the problem states that the overlapping squares are congruent, both legs of the triangle will be
and intersect at a
angle.
Thus, the sum of all four triangles is
.
Therefore, the area of the window is:

Check the picture below.
bearing in mind that an angle bisector segment will cut the angle A in two equal halves, thus θ will be half of A.
<span>They are each divisors of 6460.
</span>
You can divide it and see what you get for it