Quadrilaterals
CBSE · Class 8 · Mathematics
Summary of Quadrilaterals for CBSE Class 8 Mathematics. Key concepts, important points, and chapter overview.
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Overview
Quadrilaterals are four-sided closed figures that form an important part of geometry. The word 'quadrilateral' comes from Latin words 'quadri' meaning four and 'latus' meaning sides. This chapter explores various types of quadrilaterals including rectangles, squares, parallelograms, rhombuses, kites
Key Concepts
A quadrilateral where all angles
A quadrilateral where all angles are 90°. Properties include: opposite sides are equal and parallel, diagonals are equal in length and bisect each oth
A special rectangle where all sides
A special rectangle where all sides are equal and all angles are 90°. Properties include: all sides equal, opposite sides parallel, diagonals equal in
A quadrilateral where opposite sides
A quadrilateral where opposite sides are parallel. Properties include: opposite sides are equal, opposite angles are equal, adjacent angles add up to
A quadrilateral where all sides
A quadrilateral where all sides are equal. Properties include: opposite sides parallel, opposite angles equal, adjacent angles sum to 180°, diagonals
The sum of all interior angles
The sum of all interior angles in any quadrilateral is always 360°. This can be proven by dividing the quadrilateral into two triangles using a diagon
Learning Objectives
- Understand the definition and basic properties of quadrilaterals
- Learn about rectangles and squares and their special characteristics
- Explore parallelograms and their angle and side relationships
- Study rhombuses and their diagonal properties
- Understand the sum of angles in any quadrilateral
Frequently Asked Questions
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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