Geom Vocab.

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Across
  1. 2. The set of points in space at a fixed distance (its radius) from a point (its center).
  2. 3. A polyhedron in which all but one of the polygonal faces intersect at a single point known as the vertex of the pyramid. The side which does not intersect at the vertex is called the "base".
  3. 4. In a triangle or trapezoid, the segment from a vertex perpendicular to the line containing the opposite side
  4. 6. the theorem that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.
  5. 9. a triangle or trapezoid, the segment from a vertex perpendicular to the line containing the opposite side
  6. 13. solid having bases or ends that are parallel, congruent polygons and sides that are parallelograms.
  7. 14. the distance from the vertex to any point on the circumference of the base.
  8. 16. Half a circle. The arc of a circle whose endpoints are the endpoints of a diameter of the circle
  9. 18. point two sides of a polygon have in common. The point of intersection of the sides of an angle.
  10. 19. the bottom support of anything; that on which a thing stands or rests
  11. 20. The perimeter of a circle, which is found by multiplying its diameter times pi.
  12. 24. a perpendicular line drawn from one extremity of an arc of a circle to the diameter that passes through its other extremity.
  13. 25. The sum of the areas of the faces of a solid.
  14. 27. A circle that is drawn around the outside of a triangle and contains all the vertices of the triangle. A circle is circumscribed about a polygon if each vertex of the polygon lies on the circle.
  15. 30. A quadrilateral with all sides of the same length.
  16. 32. An angle measured from the horizontal plane downward from an observer's eye to a given point below the plane.
  17. 36. The ratio leg adjacent to the angle divided by the hypotenuse in a right triangle.
  18. 37. Measurement of the space inside a three-dimensional, or solid figure. The number of unit cubes or parts of unit cubes that can be fit into a solid.
Down
  1. 1. On a line, the set consisting of the distinct points
  2. 3. The sum of the lengths of the sides of a polygon or the length of the boundary of a closed region.
  3. 5. the faces of the lateral surface of a prism, or a face of a pyramid that is not a base
  4. 6. an ordered triple (x, y, z) of three positive integers such that x2 + y2 = z2.
  5. 7. the area of the lateral surface of a solid
  6. 8. the segment whose endpoints are points on a circle (or sphere) that contains the center of the circle as its midpoint; the length of that segment
  7. 10. a segment whose endpoints are corresponding points of a cylindric solid's bases, or whose endpoints are the vertex of a conic solid and a vertex of its base
  8. 11. The set of points in a plane that are equidistant from a given point known as its center
  9. 12. the side of a right triangle opposite the right angle.
  10. 15. An angle whose vertex is on the circle and whose sides each intersect the circle at a point other than the vertex.
  11. 17. The points of a circle that are on or in the exterior of an angle
  12. 20. The surface of a cylindric solid whose base is a circle.
  13. 21. The points of a circle that are on or in the interior of an angle
  14. 22. An angle measured from the horizontal plane upward from an observer's eye to a given point above the plane.
  15. 23. a line or a plane that touches a curve or a surface at a point so that it is closer to the curve in the vicinity of the point than any other line or plane drawn through the point.
  16. 26. The figure bounded by two radii and the included arc of the circle.
  17. 28. An angle with its vertex at the center of the circle.
  18. 29. A cylinder formed when the two circular bases are directly across from each other. The walls of a right cylinder are perpendicular to both bases.
  19. 31. A union of three or more coplanar segments (its sides) such that each segment intersects exactly two others, one at each of its endpoints (its vertices).
  20. 32. a perpendicular from the center of a regular polygon to one of its sides.
  21. 33. a solid figure having many faces.
  22. 34. a straight line extending from the center of a circle or sphere to the circumference or surface
  23. 35. A quadrilateral with two pairs of adjacent congruent sides