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A diagonal bisecting a square creates two identical right triangles. The diagonal is the hypotenuse of a right triangles, so its length is the square root of the sums of the squares on the opposite two sides.
Exterior angles of a quadriltaeral add up to 1080° , each exterior angle is equal to the interior angle subtracted from 360°. The formula for checking sums of interior angles of any multilateral figure is (n-2)*180°, hence a quadilateral has 4 sides (n) (4-2)*180°=360°
7X8=56
Neither; the sums are equal.
An infinite number.