1. The surface area of a cone S is S= 
, where r is the radius of the base and l is the slant height.
2. The slant height l is found as follows:
3.
4. The answer is C
2. The slant height l is found as follows:
3.
4. The answer is C
Please help with this Question, I've been having trouble with. As soon as possible, thanks
1 answer:
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Because the two angles on the right add to 180 degrees, we can create this system:
We can also prove that
, which, when solved, shows that 
.
When plugged in to the original equation, we find that y = 105 degrees.
We can also prove that
When plugged in to the original equation, we find that y = 105 degrees.