Decagon, a=22 m, s=14.3 m
1 answer:
The area of the decagon is 1573.39 square meters
<h3>How to determine the area of the decagon?</h3>The given parameters are:
- Side length, s = 14.3 m
- Apothem, a = 22 m
The area of a decagon is calculated using:
Substitute 14.3 for s
Evaluate the exponent
Evaluate the product and the roots
A = 1573.39
Hence, the area of the decagon is 1573.39 square meters
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Answer:
-5/13
Step-by-step explanation:
sin theta = opp / hyp
sin theta = -12 /13
we can find the adj side by using the pythagorean theorem
adj^2 + opp ^2 = hyp^2
adj^2 +(-12)^2 = 13^2
adj^2 +144 =169
adj^2 = 169-144
adj^2 = 25
Taking the square root of each side
adj = ±5
We know that it has to be negative since it is in the third quad
adj = -5
cos theta = adj / hyp
cos theta = -5/13
