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Math Help - Isosceles triangle

  1. #1
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    Isosceles triangle

    in triangle ABC, AD and DC are angle bisectors and <B=76 What is the measure of <ADC

    So I have a Triangle that is ABC, Angle A is Bisected by AD
    Angle C is Bisected By DC
    The meet at a point C in the triangle

    I am told that B is 76 degrees, Since A and C are bisected I have a triangle ADC and I want the measure of D.

    If I find the measure of angle BCA and BAC, take half of those and subtract from 180 that will give me angle D, But if I am not told that
    triangle ABC is isosceles how can I conclude the measure of angle BCA and BAC, with the information that I am given that is the only way to find the angle. So advise would be great, sorry I dont have a picture



    This is like the image that I have, where the internal point that the two intersect is D and the Three other vertex are A,B,C, Thanks

    using paint I cant get it to copy and paste or insert the image.
    Last edited by IDontunderstand; November 11th 2008 at 11:42 AM. Reason: Edit typo
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  2. #2
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    Quote Originally Posted by IDontunderstand View Post
    In triangle ABC, AD and DE are angle bisectors and <=76 What is the measure of <ADC. If AD bisects angle A, what angle does DE bisect?

    So I have a Triangle that is ABC, Angle A is Bisected by AD
    Angle C is Bisected By CD. Angle C cannot possibly be bisected by CD.

    I am told that B is 76 degrees, Since A and C are bisected I have a triangle ACD and I want the measure of D. There are two angles at D.

    If I find the measure of angle BCA and BAC, take half of those and subtract from 180 that will give me angle D, But if I am not told that
    triangle ABC is isosceles how can I conclude the measure of angle BCA and BAC, with the information that I am given that is the only way to find the angle. So advise would be great, sorry I dont have a picture
    Use microsoft Paint and draw a picture. Your description tells an impossible story.
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