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20.08.2020 •
Mathematics
The side of an Equileteral triangle is 12cm. What is its Area?
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Ответ:
A = 62.35 cm²
Step-by-step explanation:
Use the area formula A =
, where a is the side length.
Plug in the values:
A =
A =
A = 62.35 cm²
Ответ:
r=d/2=18/2=9cm
circumference=2πr=2×3.14×9=56.52cm