# U3RlcHVrb3Zh
import math
def calculate_cross_area(a, b):
return (2 * a * b) - (b ** 2)
def calculate_hexagon_area(b):
return (3 * math.sqrt(3) * (b ** 2)) / 2
area_A = calculate_cross_area(a=12, b=4)
print(f"Площа хреста з a=12 та b=4: {area_A}")
area_B = calculate_hexagon_area(b=5)
print(f"Площа шестикутника зі стороною b=5: {area_B}")
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