Answer:
147/150
Step-by-step explanation:
X/15=4/16 def of similar triangle by AAA
x = 60/16=5/2
Answer:
20
Step-by-step explanation:
Sn = (n/2)(a1 + a1 + d(n-1)), where S = sum, a1 = first term, n = number of terms, d = common difference
400 = (n/2)(1 + 1 + 2(n - 1))
400 = (n/2)(2 + 2n - 2)
400 = (n/2)(2n
400 = n2
20 = n
Twenty numbers are in the set.
Looking at the attachment, we'll determine entire hexagon area with this formula:
area = apothem^2 *Number of sides * tan(180/n)
area = 17.32^2 * 6 * tan (30)
area =
<span>
<span>
<span>
299.9824
</span>
</span>
</span>
* 6 * 0.57735
area = <span><span><span>
1,039.16903184
</span>
</span>
</span>
Now we subtract the triangle area (16*20 = 320)
shaded area = <span>
1,039.16903184
-320 = </span>
<span>
<span>
<span>
719.16903184
</span>
</span>
</span>
<span>answer is D
</span>