( insert inspirational text here)
Answer:
The diameter is 9.252 :)
Step-by-step explanation:
From the given diameter, get the radius. The perimeter of a semicircle is half the perimeter of a circle, but we excluded the base. So, the perimeter now is:
2πr+2r
Put the value of radius in the formula and get the answer wich is 9.252!
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Answer:
Roughly, sinC = 15/17
=> AB = 15, BC = 17 => AC = sqrt(17^2-15^2) = 8
=> cos C = AC/BC = 8/17