### Unit 2 Vocabulary: Congruence and Proof

Name: _____________________________

 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Across
4.A ray that divides an angle into two congruent angles. (2 Words)
7.If two angles and a non-included side of one triangle are congruent to the corresponding angles and the non-included side of another triangle, then the triangles are congruent. (3 Words)
8.The point of concurrency of the three medians of a triangle. Also known as the center of gravity. (4 Words)
12.For two lines intersected by a transversal, a pair of nonadjacent angles that lie on opposite sides of the transversal and between the other two lines. (3 Words)
15.If the hypotenuse and a leg of a right triangle are congruent to the hypotenuse and a leg of another right triangle, then the triangles are congruent. (3 Words)
16.A segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side. (4 Words)
17.If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the triangles are congruent. (3 Words)
18.To create a figure that is mathematically precise using only a compass and straightedge.
19.Sides or angles that have the same relative positions in congruent triangles. (5 Words)
Down
1.For two lines intersected by a transversal, a pair of angles that lie on the same side of the transversal and on the same sides of the other two lines. (8 Words)
2.If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the triangles are congruent. (3 Words)
3.If three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent. (3 Words)
5.Corresponding parts of congruent triangles are congruent.
6.A line perpendicular to a segment at the segment’s midpoint. (5 Words)
9.A triangle with at least two congruent sides. (2 Words)
10.The nonadjacent angles formed by two intersecting lines. (2 Words)
11.A triangle with three congruent sides. (2 Words)
13.A transformation that does not change the size or shape of a figure; a sequence of reflections, translations, and/or rotations. (2 Words)
14.Figures that have the same size, shape and measure; obtained from the other by rigid motions. (2 Words)

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