820
Объяснение:
S = AB * BC
AH = 16
HC = 25
AC = AH + HC = 25 + 16 = 41
AB^2 - AH^2 = BH^2
BC^2 - HC^2 = BH^2
AB^2 + BC^2 = AC^2
AB^2 - 16^2 = BC^2 - 25^2
BC^2 - AB^2 = 625 - 256 = 369
BC^2 = AB^2 + 369
AB^2 + AB^2 + 369 = AC^2
2AB^2 = 41^2 - 369
AB^2 = 656
AB = √656
BC^2 = 656 + 369 = 1025
BC = √1025
S = AB * BC = √1025 * √656 = √672400 = 820
820
Объяснение:
S = AB * BC
AH = 16
HC = 25
AC = AH + HC = 25 + 16 = 41
AB^2 - AH^2 = BH^2
BC^2 - HC^2 = BH^2
AB^2 + BC^2 = AC^2
AB^2 - 16^2 = BC^2 - 25^2
BC^2 - AB^2 = 625 - 256 = 369
BC^2 = AB^2 + 369
AB^2 + AB^2 + 369 = AC^2
2AB^2 = 41^2 - 369
AB^2 = 656
AB = √656
BC^2 = 656 + 369 = 1025
BC = √1025
S = AB * BC = √1025 * √656 = √672400 = 820