Puzzle | Circle Division by Six Straight Lines (original) (raw)

Last Updated : 27 Apr, 2026

Given a Circle and Six Straight Lines. What is the maximum number of pieces that one can cut the circle using these six straight lines?

Check if you were right - full answer with solution below.

**Solution:

Using six lines, we can cut the circle into 22 pieces at maximum.

Using one line, the circle can be divided into two parts.

• Two lines divide the circle into four parts.

• Three lines divide the circle into seven unequal parts.

• Four lines cut the circle into eleven parts.

• Using five lines, circle can be divided into sixteen parts.

• Finally, using six lines the maximum parts that can be formed are 22.

**We can find out the number of pieces using a mathematical formula also:

**Number of pieces = 1 + (n*(n+1)/2)