Answer:
46,57/4
Step-by-step explanation:
area = π.r^2 = π.(d^2)/4
d^2 = AB^2= 5,6^2+3,9^2 =46,57
----> area = π.46,57/4
Answer:
2nd dot
Step-by-step explanation:
<span>This polygon is a <span>hexagon.
</span></span>
<span>Triangle AED is <span>equilateral triangle.
</span></span>
<span>AH is the height <span>of an equilateral triangle.
![|AE|=|ED|=|DA|=a=5\\\\|AH|=\dfrac{a\sqrt3}{2}\\\\subtitute\\\\\boxed{|AH|=\dfrac{5\sqrt3}{2}}](https://tex.z-dn.net/?f=%7CAE%7C%3D%7CED%7C%3D%7CDA%7C%3Da%3D5%5C%5C%5C%5C%7CAH%7C%3D%5Cdfrac%7Ba%5Csqrt3%7D%7B2%7D%5C%5C%5C%5Csubtitute%5C%5C%5C%5C%5Cboxed%7B%7CAH%7C%3D%5Cdfrac%7B5%5Csqrt3%7D%7B2%7D%7D)
</span></span>
Answer:0n=0
Step-by-step explanation:
-2n+9+2n=9
-9 -9
———————
-2n+2n=0
-2n -2
———————
0n=0
Remember
(a-b)(a+b)=a²-b²
we can rewrite what we were given into
![( \sqrt{12}-4)( \sqrt{12}+4)=( \sqrt{12})^2-(4)^2=12-16=-4](https://tex.z-dn.net/?f=%28%20%5Csqrt%7B12%7D-4%29%28%20%5Csqrt%7B12%7D%2B4%29%3D%28%20%5Csqrt%7B12%7D%29%5E2-%284%29%5E2%3D12-16%3D-4%20%20%20)
definitely rational