1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Across
5.two angles in a plane that have a common vertex and a common side but no common interior points
10.the perpendicular segment from a vertex to the line containing the opposite side
13.a quadrilateral with four right angles
15.a chord that contains the center of a circle
18.a segment joining two non-consecutive vertices of a polygon
21.(points) all in one line
22.the distance from the center to the edge of the circle
24.an angle with measure of 180
26.a segment whose endpoints lie on a circle
31.an example used to provide that an if-then statement is false
34.has equal measures
35.a statement that contains the words "if and onlt if"
36.if-then statements
38.a quadrilateral with both pairs of opposite sides parallel
41.part of a line that is bounded by two distinct end points
43.a triangle with all angles congruent
44.an angle with measure between 90 and 180
47.a quadrilateral with four right ables and four congruent sides
48.a statement that can be proved easily by applying the theorem
49.the point of a segment that dividesthe segment into twon congruent segments
50.the distance between end points
51.a segment that is accepted without proof
Down
1.(points) all in one plane
2.two lines that intersect to form right angles
3.circles that lie in the same plane and have the same center
4.a 10-sided polygon
5.an angle with measure between 0 and 90
6.a statement that can be proved
7.lines that are not coplanar
8.a line, ray, or segment which cuts another line segment into two equal parts
9.a triangle with at least two sides congruent
11.a polygon that is both equiangular and equilateral
12.a line that intersects two or more coplanar lines in different points
14.proving statements by reasoning from accepted postulates, definitions, theorems, and given information
16.a figure formed by two rays that have that same endpoint
17.a triangle with all sides congruent
19.a segment from a vertex to the midpoint of the opposite side
20.two angles whose sides form two pairs of opposite rays
23.the set of points in a plane that are a given distance from a given point in a plane
25.a quadrilateral with four congruent sides
27.a 4-sided polygon
28.a line that contains a chord
29.two angles whose measures have the sum 180
30.a plane figure formed by coplanar segments (sides) such that (1) each segment intersects exactly two other segments, one at each endpoint; and (2) no two segments with a common endpoint are collinear
32.a closed segment of a differentiable curve in the two-dimensional plane
33.two angles whose measures have the sum 90
37.the figure formed by three segments joining three noncollinear points
39.an angle with measure of 90
40.a 5-sided polygon
42.a kind of reasoning in which the conclusion is based on several past observations
44.an 8-sided polygon
45.a triangle with no sides congruent
46.the set of all points

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