What is the length of the altitude of the equilateral triangle below?

Step-by-step explanation:

Hey there!

Looking on figure we find that triangle ABC is a Right angled triangle.

Taking reference angle as C, we get;

Perpendicular (p) = a

Base(b) = 5

And hypotenuse (h)= 10

Now;

Using Pythagoras relation, we get;

Put all values.

Therefore, answer is Option E.

Hope it helps..

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