Current location - Training Enrollment Network - Mathematics courses - The Hall of Prayer for the New Year in Beijing Tiantan Park is a circular hall with a bottom diameter of 24.2 meters. How many square meters does it cover? Echo wall around the new year prayer hall
The Hall of Prayer for the New Year in Beijing Tiantan Park is a circular hall with a bottom diameter of 24.2 meters. How many square meters does it cover? Echo wall around the new year prayer hall
1 and the diameter is 24.2m, then the radius is: R=24.2÷2= 12. 1.

Coverage: s = 3. 14× 12.5438+0? =459.7 square meters

2. If the radius of the inner circle is R=32.5, the circumference is 3.14× 2× r = 3.14× 2× 32.5 = 204.1m..

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