Question

Problema 4,mulțumesc!!! ​

Answer 1

Răspuns:

Explicație pas cu pas:

AB/DC = EB/EC = EB/(EB + BC)

15/35 = EB/(EB + 12)

15(EB + 12) = 35EB

15EB + 180 = 35EB

35EB - 15EB = 180

20EB = 180

EB = 180 : 20 = 9 hm

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AB/DC = AE/DE = AE/(AE + AD)

15/35 = AE/(AE + 14)

15(AE + 14) = 35AE

15AE + 210 = 35AE

35AE - 15AE = 210

20AE = 210

AE = 210 : 20 = 10,5 hm

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P = AB + AE + BE = 15 + 10,5 + 9 = 34,5 hm