xdimplesjoon
02.10.2019 •
Mathematics
Mia has a piece of ribbon that is 30.5 yards long. the length is just enough ribbon to make 5 bows that are the same size. how long is the ribbon that she uses for each bow?
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Ответ:
Ответ:
b. 386.3 unit²
Step-by-step explanation:
∠AOB = 360 /5 = 72
∠BOS = 72 /2 = 36
tan ∠BOS = tan 36° = (1/2 s) / 10.3 = 0.73
S = 2 x 10.3 x 0.73 = 15.04
Area = (15.04 x 10.3 x 5) / 2 = 387.28 ≈ 386.3