If an integer is even, then it is divisible by two., If an integer is even, then it is divisible by two., If an integer greater than one is not prime, then it is a composite number., If a polygon has four sides, then it is classified as a quadrilateral., If a quadrilateral has both pairs of opposite sides that are parallel, then it is a parallelogram., If zero is added to any integer, then the value of that integer remains unchanged., If a triangle is equilateral, then it is also an equiangular triangle., If a triangle is isosceles, then it has at least two congruent sides., If two distinct lines in a plane are parallel, then they never intersect., If two lines are perpendicular, then they intersect to form right angles.

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