2D-Shapes Archives - GeeksforGeeks

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2D-Shapes

9 posts

Introduction to Lines

Last Updated: 15 May 2026

A line in geometry is a straight path that goes on forever in both directions. It has no thickness and is usually drawn between two points, but it keeps going without stop...read more

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Introduction to Area and Perimeter

Last Updated: 14 May 2026

Area and perimeter are two basic measurements used to describe two-dimensional shapes. The perimeter is the total distance around the boundary of a shape, while the area t...read more

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Last Updated: 14 November 2025

The term 'annulus' comes from the Latin word annuli, meaning 'little ring.' An annulus is a flat, plane figure formed between two concentric circles, creating a ring-like ...read more

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School Learning

Introduction to Mensuration | Formulas for 2D and 3D Shapes, Examples

Last Updated: 23 July 2025

Mensuration is the branch of mathematics that deals with the measurement of various geometric figures and shapes. This includes calculating areas, volumes, and perimeters ...read more

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School Learning

Last Updated: 23 July 2025

A hexagon is a polygon with six sides and six angles. In a regular hexagon, all sides and angles are equal. The sum of the interior angles of a hexagon is 720°, and each i...read more

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School Learning

Angles in a Pentagon

Last Updated: 23 July 2025

Pentagon is a two-dimensional (2D) five-sided polygon having five angles. In a regular pentagon, the sum of all interior angles is equal to 540° with each interior angle ...read more

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School Learning

Pentagon in Maths

Last Updated: 01 October 2026

A pentagon is a two-dimensional polygon with five straight sides, five vertices, and five interior angles. The sum of its interior angles is 540°. A pentagon can be regula...read more

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School Learning

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Area of Parallelogram | Definition, Formulas & Examples

Last Updated: 23 July 2025

A parallelogram is a four-sided polygon (quadrilateral) where opposite sides are parallel and equal in length. In a parallelogram, the opposite angles are also equal, and ...read more

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School Learning

Mensuration-MAQ

Trapezium: Types | Formulas |Properties & Examples

Last Updated: 23 July 2025

A Trapezium or Trapezoid is a quadrilateral (shape with 4 sides) with exactly one pair of opposite sides parallel to each other. The term "trapezium" comes from the Greek ...read more

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School Learning