Class VI Mathematics
Chapter 4: Basic Geometrical Ideas
Standard NCERT & CBSE aligned study curriculum. Master concepts, track accuracy, revise weak areas, and challenge yourself with 9 customized practice modes.
Syllabus Sections
Key Formulas & Equations
Click Copy to duplicateCircle Circumference Ratio
\frac{C}{d} = \pi
Constant ratio of circle circumference to diameter.
Related Formulas from Adjacent Chapters
Divisibility by 3 Rule
\sum \text{digits} = 3k
[From Playing with Numbers] A number is divisible by 3 if the sum of its digits is a multiple of 3.
Reflex Angle range
180^\circ < \theta < 360^\circ
[From Understanding Shapes] Angle larger than a straight angle.