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similar figures that have the same shape but different size similar figures have side lengths that are proportional. similarity statement states that two figures are similar match each corresponding part.

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congruent figures have the same shape and same size congruency statement states that two figures are congruent match each corresponding part.

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exterior angle the measure of an exterior angle is equal to the of the 2 non adjacent interior angles of the triangle.

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triangle sum theory the sum of the 3 angles of a triangle equal 180 degrees

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alternate exterior angles that are congruent on the outside of the parallel lines one up one down one left one right

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Alternate interior angles that see congruent on the inside of the of the parallel lines one up one down one left one right.

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corresponding angle definition are congruent angles formed whenever two lines intersect across from each other.

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vertical angle definition is congruent angles are formed whenever two lines intersect across the vertex from each other.