Сторона AB треугольника ABC равна 23 см, сторона AC на 6 см больше стороны AB,
а сторона BC на 3 см меньше стороны AC.
Найдите периметр треугольника ABC.
alenabarsukova20
2
11.04.2020 12:43
8
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2
78
Объяснение:
ΑΒ=23
ΑC=ΑΒ + 6= 23 +6=29
ΒC= ΑC-3= 29-3=26
Ρ=ΑΒ +ΑC +ΒC= 23+29+26= 78