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Gyaan Maths
CBSE · Class 6-10
Class 8 · Chapter 4

Practical Geometry

Constructing quadrilaterals when specific measurements are given.

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Detailed theory
Need 55 measurements (side + side + side + diagonal + angle etc). Same as splitting into two triangles.
Key concepts & formulas
01
A quadrilateral is uniquely constructed if 55 measurements are known.
02
44 sides and 11 diagonal ⇒\Rightarrow unique quadrilateral.
03
33 sides and 22 diagonals ⇒\Rightarrow unique quadrilateral.
04
22 adjacent sides and 33 angles ⇒\Rightarrow unique.
05
44 sides and 11 angle ⇒\Rightarrow unique.
Gyaan Maths — CBSE Class 6-10, built for board-toppers.
v1.1 · Feb 2026