Shamin Y.

asked • 01/20/17

Let ABC be an isosceles triangle with AB=AC.Suppose that the bisector of angleC meets AB at D and that angleA is 100.if BC=2017, FIND AD+CD

I could find AB and AC with the help of trigonometry. But still I am struggling.. I have been trying to do this for about a month.. All I need is a guideline

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Kenneth S. answered • 01/20/17

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Step one is to draw and label the figure described herein.
 
You can find that angle B = 40o, angle DCB = 20o, and angle BDC = 120o.
Then, since BC = 2017, you can find sides BD and DC, using the Law of Cosines (or Law of Sines).
 
That should get you started, if you're willing to do the work.
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Tim C.

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Not cool to insult the students!!!! Remember that potential clients watch what u write and may not like what they see.
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01/20/17

Kenneth S.

 
I do not insult the student; I merely apply the word to that student's statement.
Too many students are just dumping easy questions on the website, rather than attempting any logical steps.
I think that we can assume that no word problems are inflicted on students without first exposing them to examples and encouragement, such as "Let x = ..."
I think that they should be called to task to take responsibility for their learning, and to accept challenges, and pay attention to their classes and READING THEIR BOOKS.
 
 
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01/20/17

Tim C.

tutor
I agree with all of your thoughts and have the same thoughts too, however I feel as tutors on a public forum, we should be as congenial as possible, even if we feel otherwise. I have thought about taking a break from answering questions here, due to many of the issues you mentioned and a general lack of appreciation from question-askers. 
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01/21/17

Shamin Y.

I am sorry.I really tried my heart and soul to solve that. But believe me, I couldn't. I relly apprecoate the website and respect the tutors like u. 
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01/21/17

Kenneth S.

Shamin: do you understand the process, now, and do you have the answer?  To check them, you can plot all of these points on graph (quadrille) paper--they should be collinear (all 4 on one line) and successive distances from one to the next ought all to be equal. This visualization can be helpful for most problems in 'coordinate geometry.'
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01/21/17

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