Answer:I figured it out for you. The answer is 8-6*sq 3
Step-by-step explanation:
I used Math way
we are given
equilateral triangle
we can see that triangle ACD is a right angled triangle
so, we can use Pythagoras theorem for this triangle
hypotenuse=AC
Adjacent=CD
opposite=AD=a
and
![AC=6\sqrt{3}](https://tex.z-dn.net/?f=AC%3D6%5Csqrt%7B3%7D)
![CD=3\sqrt{3}](https://tex.z-dn.net/?f=CD%3D3%5Csqrt%7B3%7D)
![AD=a](https://tex.z-dn.net/?f=AD%3Da)
now, we can use Pythagoras theorem
and we get
![AC^2=CD^2+AD^2](https://tex.z-dn.net/?f=AC%5E2%3DCD%5E2%2BAD%5E2)
now, we can plug values
![(6\sqrt{3} )^2=(3\sqrt{3} )^2+a^2](https://tex.z-dn.net/?f=%286%5Csqrt%7B3%7D%20%29%5E2%3D%283%5Csqrt%7B3%7D%20%29%5E2%2Ba%5E2)
now, we can solve for a
![108=27+a^2](https://tex.z-dn.net/?f=108%3D27%2Ba%5E2)
![27+a^2-27=108-27](https://tex.z-dn.net/?f=27%2Ba%5E2-27%3D108-27)
![a^2=81](https://tex.z-dn.net/?f=a%5E2%3D81)
![a=9](https://tex.z-dn.net/?f=a%3D9)
so, option-A..........Answer
To the nearest inch it'll be
d×3.14=63
= 20 inches
None you do not even have 35 feet which would make just one pin