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The circumference of a semicircle is 20.56 cm. What is its diameter? Fast, time is short
I haven't learned this for a long time. I don't understand it
The circumference of the circle is 6.28 meters, and the area is calculated,
Perimeter = 2 Π R
6.28=2×3.14×r
r=1
Area s = Πr & #178;
s=3.14×1²
s=3.14m²
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