Angle Bisector Calculator

Calculate the angle bisector of a triangle

Enter side a

Enter side b

Enter side c

How it works

Calculate the angle bisector of a triangle

The Formula
AB / AC = BD / DC
Worked Example
  1. Example

    Find the angle bisector of a triangle with sides 3, 4, and 5

Tips, Assumptions & Limitations
  • The angle bisector theorem states that the ratio of the lengths of the two segments of the opposite side is equal to the ratio of the other two sides.
FAQ

The angle bisector theorem states that the ratio of the lengths of the two segments of the opposite side is equal to the ratio of the other two sides.

Companion article

Angle Bisector Theorem: A Step-by-Step Guide

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