Fortune Telling Collection - Ziwei fortune-telling - How many square meters does it take to build a circular flower pond with a diameter of16m? If you put a fence around it to protect the flower seedlings, how many meters is the fence?
How many square meters does it take to build a circular flower pond with a diameter of16m? If you put a fence around it to protect the flower seedlings, how many meters is the fence?
3. 14×( 16÷2)2,
=3. 14×64,
=200.96 (m2);
3. 14× 16=50.24 (m).
A: The building area is 200.96 square meters; The fence is 50.24 meters long.
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