Scalene: a triangle with all sides unequal is called a scalene triangle.
Hence, it is formed by a line segment joining two ends of a curve.Īn oval is like a circle, but the only difference is that all the points of an oval are not at the same distance from the centre.Ī triangle is a polygon which is made by joining three line segments. The diameter is the biggest chord of the circle.Ī circle divided into its half is called a semi-circle. The fixed point is called the centre while the constant distance is called the radius of the circle.Ī line segment passing through the centre and joining any two points on the circle is called the diameter.Īny part of the curve of the circle is called an arc.Ī line segment joining any two points of the circle and not necessarily passing through the centre is called a chord. It is also defined as the locus of all the points in a plane that are at a constant distance from a fixed point. Note*- A quadrilateral is a closed plane figure bounded by four straight lines.Ī polygon is a closed plane figure bounded by at least three straight lines.Īn enclosed round figure made by a curved line. The following table lists the basic 2D Geometric Figures. A sphere is a 3D geometric figure as it has a third dimension as well which is its thickness. In real life, any round object is not considered as a circle but a sphere. They are represented in two axes (the x-axis and the y-axis).įor example, a circle is a 2D figure and can only exist on a plane surface like paper. Hence, these figures do not exist as real-life objects. The points, lines, and curves used have negligible thickness. They are made by joining two points or lines to form polygon of different types or by joining curves to form circle or eclipse. In simple terms, the figures that can only be drawn on to a plane surface (like paper) are 2D figures. The figures that have only two dimensions (length and breadth) are called 2D geometric shapes. 2D meaning two dimensional refers to figures that have only one plane/surface.
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