Technical words of the day 2

2. A line perpendicular to the axis of symmetry used in the definition of a parabola.
3. The vertex at the tip of a cone or pyramid.
7. A way of writing two conditionals at once: both a conditional and its converse.
8. a three-dimensional shape in geometry that narrows smoothly from a flat base (usually circular base) to a point(which forms an axis to the centre of base) called the apex or vertex.
10. A u-shaped curve with certain specific properties.
13. How close an approximation is to an actual value.
16. A line segment between the center and a point on the circle or sphere.
18. Exactly equal in size and shape.
20. a roughly almond-shaped mass of grey matter inside each cerebral hemisphere
21. A corner point of a geometric figure.
22. Half the difference between the minimum and maximum values of the range
24. a fixed point on the interior of a parabola used in the formal definition of the curve.

1. a quadrilateral with at least one pair of parallel sides. No other features matter.
4. a quadrilateral that has two pairs of parallel sides.
5. The region between two concentric circles which have different radii.
6. Cut into two congruent halves.
9. messenger particle of the strong nuclear force, which binds subatomic particles known as quarks within the protons and neutrons of stable matter
11. A line segment, line, or plane that divides a geometric figure into two congruent halves.
12. is a three-dimensional solid that holds two parallel bases joined by a curved surface, at a fixed distance.
14. The first coordinate in an ordered pair.
15. A word used to indicate any path, whether actually curved or straight, closed or open.
17. the complete set of genes or genetic material present in a cell or organism.
19. a 3-dimensional shape with two identical shapes facing each other. These identical shapes are called “bases”
23. A word for a set of points that forms a geometric figure or graph.