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Question 1108207: solve for x
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Answer by ikleyn(52803) About Me  (Show Source):
You can put this solution on YOUR website!
.
1.  Find the area of the triangle using the Heron's formula.


2.  Then find the altitude of the triangle.


3.  Then apply Pythagoras to find x.

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Regarding the Heron's formula, see the lessons
    - Proof of the Heron's formula for the area of a triangle,
    - One more proof of the Heron's formula for the area of a triangle,
in this site.