### Geometry vocabulary

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Across
3.the amount of space a 3-D object can hold
7.of the same size and shape
8.an angle whose vertex is the center of the circle
9.half of a sphere
11.the distance from the center to the circle
13.a reversed conditional;
14.a four-sided polygon
15.a triangle with one right angle
16.An infinitely small location in space marked by a specific coordinate
17.the distance around a 2-D figure
18.a collection of points extending along one dimension
19.the polygon shapes making up the sides of a polyhedron
21.lines that are not parallel and do not intersect in space
22.an angle measuring between 90 and 180 degrees
24.a quadrilateral with two pair of parallel sides
25.a covering of a plane with congruent copies of the same region with no holes or overlaps
26.a two-dimensional sheet defined by any three points
27.a 2-D figure; the set of all points at a given distance from the center
28.a ray that is in the interior of an angle and forms two equal angles with the sides of that angle
29.congruent angles formed by two parallel lines cut by a transversal; positioned on matching "corners" of intersections
30.the distance between an arc's endpoints along the path of the circle
32.a line that intersects 2 others
38.the top and bottom parallel polygonal faces
39.a triangle with one obtuse angle
40.two or more angles that sum to 90 degrees
41.a line that crosses a pair of parallel lines
42.two or more angles that sum to 180 degrees
43.an arc whose endpoints form an angle over 180 degrees with the center of the circle
47.an angle measuring between zero and 90 degrees
48.a set of three numbers that can be side lengths of a right triangle
49.a triangle with three sides of different lengths
50.the segment connecting the vertex of an angle in a triangle to the midpoint of the side opposite it
51.congruent angles formed by two parallel lines cut by a transversal; located on opposite sides of the transversal outside the parallel lines
52.congruent opposite angles formed by two intersecting lines
Down
1.an educated guess or opinion; a hypothesis
2.a conditional and its converse where the converse is also true; uses the words if and only if
3.the angle formed by the equilateral sides of an isoscoles triangle
4.a quadrilateral with all congruent sides and all congruent angles
5.meeting at a 90 degree angle
6.a statement that tells if one thing happens, another will follow
10.the perimeter of a circle
12.lines that never intersect in a plane
13.a line segment connecting any two points of the interior does not go outside the polygon; none of the interior angles is greater than 180 degrees
20.a type of conditional; if not q, then not p;
23.congruent angles formed by two parallel lines cut by a transversal; located on opposite sides of the transversal between the parallel lines
26.the bisector of a segment perpendicular to it
27.the point in the middle of the circle or sphere
29.a line segment connecting two points of the interior can go outside the polygon; at least one of the interior angles is greater than 180 degrees
31.a statement assumed to be true without proof;
33.a triangle with three acute angles
34.the measure of the tilt of a line; rise over run
35.a form of conditional; if not p, then not q
36.a triangle with two congruent legs
37.an angle measuring exactly 90 degrees
44.the height of a 2-D or 3-D geometric figure measured perpendicularly from the center of the top face or point to the center of the base
45.in the same line
46.an arc whose endpoints form an angle less than 180 degrees with the center of the circle;

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