You have studied Geometry in previous lessons. What are the different termsthat you have learned from it?

In Geometry, there are several terms that we have learned. Here are some of them:

1. Point: A point in geometry is a location. It has no size i.e. no width, no length and no depth.

2. Line: A line is a straight one-dimensional figure having no thickness and extending infinitely in both directions.

3. Plane: A plane is a flat, two-dimensional surface that extends infinitely far.

4. Angle: An angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle.

5. Circle: A circle is a shape with all points the same distance from its center.

6. Triangle: A triangle is a polygon with three edges and three vertices.

7. Quadrilateral: A quadrilateral is a polygon with four edges (sides) and four vertices (corners).

8. Polygon: A polygon is a plane figure that is described by a finite number of straight line segments connected to form a closed polygonal chain or polygonal circuit.

9. Perimeter: The perimeter is the distance around a two-dimensional shape.

10. Area: The area is the quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in the plane.

11. Volume: Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains.

12. Radius: The radius of a circle is the distance from the center of the circle to any point on its circumference.

13. Diameter: The diameter of a circle is the longest distance from one end of the circle to the other.

14. Chord: A chord of a circle is a straight line segment whose endpoints both lie on the circle.

15. Tangent: A tangent line to a circle is a line that touches the circle at exactly one point.

These are just a few of the many terms used in geometry.