Angle Bisector Calculator

Calculate the length of an angle bisector in a triangle using the Angle Bisector Theorem

Angle Bisector Theorem Formula
l = (2 × A × B × cos(θ/2)) / (A + B)
Where A and B are adjacent sides, θ is the included angle

Calculation Results

A
Side A Length
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B
Side B Length
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θ
Included Angle
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l
Bisector Length
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Step-by-Step Calculation

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