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三角形周长和面积,保留两位

云竹文斋 2022-01-08 阅读 60
python
from math import *
from decimal import Decimal

a, b, c = float(input()), float(input()), float(input())
perimeter = Decimal(a + b + c).quantize(Decimal('0.01'), rounding='ROUND_HALF_UP')
s = float(perimeter/2)
area = Decimal(sqrt(s*(s-a)*(s-b)*(s-c))).quantize(Decimal('0.01'), rounding='ROUND_HALF_UP')
print(f'周长={perimeter}')
print(f'面积={area}')
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