Answer:
The answer is 1.
Step-by-step explanation:
If it is 5 or more, you round up. If it is 4 or less, you keep it the same.
Answer:
for what ? put your question completely
All sides are equal in an equilateral triangle and the perpendicular bisects the side too.
so BC will be bisected and the segments be 5 each.
you can use Pythagoras theorem to find the altitude length, hypotenuse will be one side of the triangle.

$h^2=100-25=75$
$h=\sqrt{75}=5\sqrt3$