Ответ учителя по предмету Геометрия
1.
AB = BC = AC
KP = PH = HK
AB = KP (по усл.)
=> AB = BC = AC = KP = PH = HK
KH = BC = 5 см
Ответ: 5 см
2. Пусть x — угол при основании, тогда 3x — угол при вершине
x + x + 3x = 180° (сумма углов треугольника)
5x = 180°
x = 36°
36° * 3 = 108° — угол при вершине
Ответ: 36°, 36°, 108°
3. Пусть x (см) — боковая сторона, тогда основание равно x + 7 (см)
x + x + x + 7 = 73
3x = 66
x = 22
22 + 7 = 29 (см) — длина основания
Ответ: 22 см, 22 см, 29 см
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