1.

Find the length of angle bisector if the sides of a triangle are 12, 18 and 20 cm​

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rong>Answer:

let the triangle be ABC and the largest side be BC angle a is bisected the bisector AD meet BC at point D. We have to find the length BD and CD..

because AD is the bisector the ratio of AB and AC will be EQUAL to ratio of BD and CD.let BD=x then CD=20x..

as I have take AB-12 INCHES AC-18 inches and BC-20 inches..

so., AB/AC=BD/CD

12/18=x/20x

18x=240-12x

30x=240

x=8 inches

BD=8...



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