Answer:
129.8 approximately
Step-by-step explanation:
So this sounds like a problem for the Law of Cosines. The largest angle is always opposite the largest side in a triangle.
So 11 is the largest side so the angle opposite to it is what we are trying to find. Let's call that angle, X.
My math is case sensitive.
X is the angle opposite to the side x.
Law of cosines formula is:

So we are looking for X.
We know x=11, a=4, and b=8 (it didn't matter if you called b=4 and a=8).



Subtract 80 on both sides:


Divide both sides by -64:

Now do the inverse of cosine of both sides or just arccos( )
[these are same thing]

Time for the calculator:
X=129.8 approximately
Step-by-step explanation:
8x - 3 = - 19 + 6x
8x - 6x = - 19 + 3
2x = - 16
x = - 16 /2
x = - 8
Answer:
Cone Volume = (PI * radius^2 * height) / 3
Cone Volume = (PI * 6^2 * 12) / 3
Cone Volume = 452.3893421169 cubic inches
Source: http://www.1728.org/volcone.htm
Step-by-step explanation:
Answer:
32
Step-by-step explanation:
[1 , 6] = [1 , 3] + [3 , 6]
[6 , 3] = 10
[3 , 6] = -10
22 = [1 , 3] + (-10)
[1 , 3] = 22 + 10 = 32
Step-by-step explanation:
let breath be b
area = length × breath
155 = 13 × b
b= 155/13
b= 11.92