Проведём высоту H из точки C к стороне AB.
DM = CH = 12 см
BH = √20² - 12² =√400 - 144 = √256 = 16
DC = MH = 4
AM = AB - MH - HB
AM = 25 - 4 - 16 = 5
AD = √12² + 5² = √144 + 25 = √169 = 13
P = AD + DC + CB + AB
P = 13 + 4 + 20 + 25 = 62
Ответ: 62
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Проведём высоту H из точки C к стороне AB.
DM = CH = 12 см
BH = √20² - 12² =√400 - 144 = √256 = 16
DC = MH = 4
AM = AB - MH - HB
AM = 25 - 4 - 16 = 5
AD = √12² + 5² = √144 + 25 = √169 = 13
P = AD + DC + CB + AB
P = 13 + 4 + 20 + 25 = 62
Ответ: 62