Solve this triangle problem

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Solve this triangle problem

Postby willbali » Tue May 02, 2017 5:13 am

How to find the length DE. ABC is an isoceles triangle with length AB 20 cm
see attached jpg





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willbali
 
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Re: Solve this triangle problem

Postby Guest » Tue May 02, 2017 2:30 pm

AE = DE(becasue triangle [tex]AEC \cong DEC[/tex]

[tex]\frac{AE}{EB} = \frac{AC}{BC}[/tex]

[tex]AC = 20[/tex]

[tex]AB^2 = AC^2 + AB^2[/tex]

Is it clear?

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Re: Solve this triangle problem

Postby togiap » Wed Jun 21, 2017 6:26 am

your problem don't enough data: What is CE?
Guest's Answer: [tex]{AB}^{2} = {AC}^{2} + AB^{2}[/tex] is false.

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