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Answer:
81
Step-by-step explanation:
sin 31 = 42/x
x sin 31 = 42
x = (sin 31)/42
Answer:
1,3
Step-by-step explanation:
The answer is 20 quarters <span />
note that for a 30°-60°-90° triangle , the sides are 1, √3, 2
If the hypotenuse (2) is equal to 18, find the other lengths
First, find side (1). Divide 18 by 2
18/2 = 9
Next, multiply 9 with √3
9(√3) = 9√3
Finally, find the perimeter. Add all sides:
P = 18 + 9 + 9√3
P = 9√3 + 27
hope this helps