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1.Three positive integers have a sum of 28.The greatest poss

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1.Three positive integers have a sum of 28.The greatest possible product that these integers can have is?
2.Jack was trying to tessellate regular pentagons.He managed the following figure.The size of angle.a.is?
1图:


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1.Three positive integers have a sum of 28.The greatest poss
1. 三个正整数和为28,最大可能的积是多少,没说要不同正整数,就是取最相近9,9,10相乘咯,810.
2. 也就是算360度减去三个正五边形的内角,360-(108×3)=36度