Geometry

5. a round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the center).
7. a plane figure with three straight sides and three angles
8. a round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the center).
10. Area the area of such an outer part or uppermost layer.
11. 3-dimensional space enclosed by a boundary or occupied by an object.
13. a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square.
14. a symmetrical three-dimensional shape, either solid or hollow, contained by six equal squares.

1. a solid geometric figure with straight parallel sides and a circular or oval cross section.
2. a symmetrical three-dimensional shape, either solid or hollow, contained by six equal squares.
3. a plane figure with four equal straight sides and four right angles.
4. a four-sided plane rectilinear figure with opposite sides parallel.
6. the length of any great circle, the intersection of the sphere with any plane passing through its centre
8. a solid geometric figure with straight parallel sides and a circular or oval cross section.
9. a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.
12. a quadrilateral with only one pair of parallel sides.