How this calculation works
Find the remaining chord segment from the product of the two segments of the other chord.
ab=cd for chords crossing inside a circleA worked example
Segments 3 and 8 on one chord give product 24. A segment of 4 on the other chord pairs with 6.
Good to know
All segment lengths start at the common intersection.
Reference: OpenStax Algebra and Trigonometry, Trigonometric Applications (opens in a new tab) ↗
Read the result
Find the remaining chord segment from the product of the two segments of the other chord.
The primary result is labeled “Missing segment”. Keep the input definitions in view when comparing this result with another method.
Try a related calculation
All segment lengths start at the common intersection.
For a related exercise, try the circle calculator.
A few questions, answered
How can I check the default inputs by hand?
Segments 3 and 8 on one chord give product 24. A segment of 4 on the other chord pairs with 6.
Which rule does this calculator apply?
ab=cd for chords crossing inside a circle