Answer:
A)
Step-by-step explanation:
I think that it’s the last
6
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It's too short.<span> Write at least 20 characters to explain it well.</span>
Since the triangle is equilateral, all its angles are equal to 60°
AO is the bisector⇒∠OAD = 30°
AO is the hypotenuse, ∠OAD = 30°⇒
OD=5*2=10m
By the Pythagorean theorem




Answer: A)
m²
P.S. Hello from Russia and sorry for my bad english :^)