A polygon with more than ten sides is called an “11-gon”, “12-gon”, etc.Īn angle is a measure of how much two lines bend around each other. Polygons can be classified according to the number of sides they have. The word “polygon” comes from the Greek word “polus”, meaning “many” and “gōn”, meaning “angle”. A parabola is a Basic concepts in geometry Class 6 – PolygonsĪ polygon is a closed plane figure formed by a finite number of straight lines segments.Įach line segment meets exactly two other line segments, at angles that are either adjacent or supplementary. Here is a diagram of the circumference and area of an ellipse:Īnother type of curve is the parabola. The area of an ellipse is the amount of space inside the ellipse. The circumference of an ellipse is the distance around the edge of the ellipse. The distance from the foci to any point on the ellipse is called the focal length. An ellipse is a curve that is made up of all points that are the same distance from two points, called the foci. Here is a diagram of the circumference and area of a circle:. The area of a circle is the amount of space inside the circle. The circumference of a circle is the distance around the edge of the circle. The distance from the centre to any point on the circle is called the radius. A circle is a type of curve that is made up of all points that are the same distance from a certain point, called the centre. There are many different types of curves, and we will be looking at a few of them in this chapter. In this chapter, we will be looking at curves. Class 6 Chapter 4 Basic Geometrical Ideas – Curves It is represented by an O on a piece of paper. Oblique line: An oblique line goes from one corner to another. It is represented by an H on a piece of paper.ģ. Horizontal line: A horizontal line goes from left to right. It is represented by a V on a piece of paper.Ģ. Vertical line: A vertical line goes up and down. It is represented by a thin, straight line on a piece of paper. Basic Geometrical Ideas of Class 6 – LinesĪ line is a straight path or a boundary between two points. Basic Geometric Ideas 6th Grade – Line segmentĪ line segment is a part of a line that has two endpoints. Planes are made up of lines and can be flat or curved. Lines are made up of points and can be straight or curved. 
Points are the simplest of all geometrical objects.
There are three basic geometrical concepts taught in class 6 – points, lines and planes. Perpendicular lines are two lines that intersect at a right angle. Parallel lines are two lines that never meet and are always the same distance apart.
The angle is measured in degrees, with 360 degrees making a complete circle. Angles are formed when two rays meet at a point. A ray is a line extending infinitely in one direction from a point. A line segment is a portion of a line between two points. A plane is a flat surface that extends infinitely in all directions. A point is a location in space with no dimensions. A line is a straight path extending infinitely in both directions.
0 kommentar(er)
