Secant Secant Theorem Calculator

Calculate the exterior length of a secant segment when two secant segments intersect outside a circle. If two secants are intersecting outside a circle from a point, then the product of the lengths (C+D) of one secant segment and its external part of the segment equals the product of the lengths (A+B) of the other secant segment and its external part of the segment. Use this online Secant Theorem Calculator to find the exterior length of secant.

Length of Two Intersecting Secants

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Formula:

A x B = C x D Where, A = Length of Secant 1 B = Exterior Length of Secant 1 C = Length of Secant 2 D = Exterior Length of Secant 2

Example

Secant Length using Secant Secant Theorem
A circle with Length of Secant 1 as 7cm, Exterior Length of Secant 1 as 8cm, Length of Secant 2 as 5cm.
Exterior Length of Secant 2 = 7 x 8 = 5 x D
=11.2 cm


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