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**3.**any angle greater than 90°**8.**two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the two triangles are congruent.**9.**The point at which at which the three perpendicular bisectors intersect in a triangle**11.**the side of the triangle that is opposite the right angle**13.**The point at which the three angle bisectors intersect in a triangle**16.**angles that have equal measure.**17.**a triangle in which all three sides have different lengths**18.**the three sides of a triangle are congruent to the three sides of another triangle**19.**the sum of the measures of the angles of a triangle is 180°

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**1.**is used to find a missing side length on a right triangle (a^2 + b^2 = c^2)**2.**an angle of exactly 90°**4.**corresponding parts of congruent triangles are congruent**5.**a segment that joins the midpoint of two sides of a triangle**6.**the exact middle point of a line**7.**a triangle that has two sides of equal length**10.**a triangle in which all three sides have the same length**12.**the two sides of a right triangle that make up the 90 degree angle**14.**two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the two triangles are congruent.**15.**angles that measure less than 90°.**18.**two sides and the included angle of one triangle are equal to two sides and the included angle of another triangle, the triangles are congruent.**20.**the corresponding lengths of their hypotenuse and one leg are equal.