geometry

4. An angle is formed when two lines or line segments meet at a common point, measured in degrees.
7. A quadrilateral is a polygon with four sides and four angles.
10. Parallel lines are lines that never intersect and are always equidistant from each other.
11. A rhombus is a quadrilateral with all sides of equal length.
13. Volume is the amount of space occupied by a three-dimensional object.
14. A triangle is a polygon with three sides and three angles.
15. A cone is a three-dimensional figure with a circular base and a curved surface that tapers to a point.
17. A trapezoid is a quadrilateral with exactly one pair of parallel sides.
18. A line is a straight path that extends infinitely in both directions and has no thickness.

1. Symmetry is a balanced arrangement of parts on opposite sides of a line, plane, or point.
2. A circle is a closed curve made up of all points equidistant from a fixed center point.
3. A parallelogram is a quadrilateral with opposite sides that are parallel.
5. A square is a rectangle with all sides of equal length.
6. A point is a location in space that has no size or dimension, represented by a dot.
8. Perimeter is the distance around the outside of a two-dimensional shape.
9. A rectangle is a quadrilateral with four right angles.
10. A polygon is a closed plane figure made up of straight line segments.
12. A sphere is a three-dimensional figure with all points on its surface equidistant from its center.
15. A cylinder is a three-dimensional figure with two parallel circular bases and a curved surface.
16. To bisect means to divide something into two equal or congruent parts.