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23 February, 09:42

Given: ∆ABC, m∠C = 90° m∠BAC = 2m∠ABC BC = 24, AL - ∠ bisector Find: AL

Will be brainliest answer if right!

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  1. 23 February, 10:10
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    M∠BCA=90, then m∠BAC + ∠ABC=90

    m∠BAC = 2m∠ABC, then 2m∠ABC + m∠ABC=90, m∠ABC=30, and m∠CAB=60

    ΔBAC is a 30-60-90 right triangle, in which the ratio of the side lengths is 1:√3:2

    AC:BC=1:√3, AC=BC/√3

    BC=24, AC=24/√3=8√3, (you don't need AB, but AB=2AC=16√3)

    AL bisects angle A = >m∠LAC=30

    ΔALC is a 30-60-90 right triangle, in which the ratio of the side lengths is 1:√3:2

    AC:AL=√3:2

    AL=2AC/√3=2*8√3/√3=16
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