Across
- 1. The distance from the center of a circle to any point on its circumference.
- 3. A perfect round ball. A sphere is a closed solid bounded by a surface on which all points are equidistant from a central point called the center.
- 5. A planar surface of a solid figure.
- 7. The side opposite the right angle in a right triangle.
- 9. Intuitively speaking, curved outward or toward the eye.
- 14. An angle with a measure between 0° and 90°.
- 16. An angle that measures 90° or /2 radians. It is the angle between two perpendicular lines such as the corner of a square or two perpendicular planes such as the wall and the ground.
- 17. Two lines that intersect at right angles.
- 19. Also called half-line. It is a straight line that extends from a point.
- 20. A pair of numbers that describe the position of a point on a coordinate plane by using the horizontal and vertical distances from the two reference axes.
- 21. An initial proposition or statement that is generally accepted as true without proof (self-evident truth) and from which further statements, or theorems, can be derived by using logical deduction.
- 22. A polyhedron with two parallel, congruent polygons being its bases and all the other faces being parallelograms.
- 25. One of the two pairs of equal angles formed when two straight lines intersect each other.
- 26. A three-dimensional figure bounded by plane polygonal faces. The point at which three or more faces meet is called a vertex. A line along which two faces meet is called an edge.
- 28. Two angles that add up to 180°.
- 29. Two rays sharing a common endpoint.
- 31. A number in a sequence or the numerator or denominator of a fraction.
- 32. A solid formed by rotating a right triangle around one of its legs.
- 33. When at least one of the interior angles of a polygon is greater than 180°.
- 38. Two angles that share the same vertex and have one side in common between them.
- 39. Lying on the same straight line.
- 40. An angle that is between 90° and 180°.
- 41. A straight line or a plane that divides a line, a plane, an angle, or a shape into two equal parts.
- 42. Two or more straight coplanar lines that do not intersect.
- 43. The geometric figure formed by two points.
- 45. A unit of measure used to measure the magnitude of an angle, equal in magnitude to 1/360 of a complete revolution.
Down
- 2. A line segment that passes through the center of a circle and has its two endpoints on the circle. It also represents the length of such a line segment.
- 4. A plane figure bounded by three or more straight-line sides.
- 6. An additional geometric figure that is constructed to assist in solving a problem or producing a proof.
- 8. A straight line along which two faces of a solid meet.
- 9. The boundary line of a circle or the length of such a boundary line.
- 10. A pair of adjacent angles formed by intersecting lines.
- 11. Two acute angles that add up to 90°.
- 12. In plane geometry, when one figure fits exactly on top of the other through simple translation and/or rotation.
- 13. The point on a line segment that divides the given line segment into two congruent parts.
- 15. A can-shaped solid figure.
- 18. A solid figure with one face a polygon (the base) and the other faces being triangles that all share the same vertex.
- 20. Points or lines that all lie in the same plane.
- 23. Also called non-coplanar lines. They are straight lines that are neither parallel, nor intersecting. They lie in different planes.
- 24. a flat surface that extends indefinitely.
- 26. A set of logical arguments used to deduce or prove a mathematical theorem from a set of axioms.
- 27. The pair of angles opposite each other formed by two intersecting lines.
- 30. A point at which the two rays of an angle meet or the intersection point of two sides of a plane figure.
- 34. Two things that are located or facing directly across.
- 35. Part of a line between two points called endpoints.
- 36. The length of the boundary around a shape or a figure.
- 37. A general conclusion proposed to be proved upon the basis of certain given hypotheses or assumptions; or, a general conclusion that has been proved, e.g., Pythagorean Theorem, Binomial Theorem, Fundamental Theorem of Algebra, etc.
- 41. A point B that lies on the line connecting two points A and C and has one of the two points on each side of it.
- 42. The geometric figure formed at the intersection of two distinct lines.
- 44. The surface included within a closed figure, measured by the number of square units needed to cover the surface.