This is a very good question that the brainly ppl cant delete, WHYYYYYYY?!
2 answers:
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Since the triangle DEF is an equilateral triangle and x is the height of this triangle, we can use the following formula for the height of an equilateral triangle:
Where 'l' is the length of the triangle side.
So, using l = 13, we have:
So the value of x is 11.2