Geometry

1. A three-dimensional shape with two parallel and congruent bases connected by rectangular faces.
5. A line segment that connects two points on the circumference of a circle.
7. Area: The total area of all the faces of a three-dimensional shape.
8. A chord that passes through the center of a circle.
9. A perfectly symmetrical three-dimensional shape in which all points on the surface are equidistant from the center.
11. The region of a circle enclosed by two radii and the arc between them.
12. The distance around the outside of a circle.
14. A line that touches a circle at exactly one point.
16. A perpendicular line segment from a vertex to the opposite side of a triangle.
17. A three-dimensional shape with a polygonal base and triangular faces that meet at a common vertex.
18. Angle: An angle whose vertex is on the circumference of a circle and whose sides are chords.

2. A line segment from the center of a circle to a point on the circumference.
3. The total distance around the outside of a shape.
4. A three-dimensional shape with a circular base and a curved surface that tapers to a point.
5. Angle: An angle whose vertex is at the center of a circle and whose sides are radii.
6. A quadrilateral with four sides of equal length and four right angles.
9. Triangle: A triangle with no sides of equal length.
10. A portion of the circumference of a circle.
12. A three-dimensional shape with two circular bases that are parallel and congruent, connected by a curved surface.
13. A quadrilateral with four right angles.
15. A quadrilateral with all sides of equal length.