Zadanie
Korzystamy z twierdzenia Pitagorasa
a² + b² = c²
a)
a = 3; b = 4; c = ?
3² + 4² = c²
9 + 16 = c²
c² = 25
c = √25
c = 5 cm
Ob. = a + b + c
Ob. = 3 cm + 4 cm + 5 cm = 12 cm
b)
a = 8; b = 12; c = ?
8² + 12² = c²
64 + 144 = c²
c² = 208
c = √208= √16 · 13
c = 4√13 cm
Ob. = 8 cm + 12 cm + 4√13 cm = (20 + 4√13) cm = 4 · (5 + √13) cm
c)
a = 5; b = 9; c = ?
5² + 9² = c²
25 + 81 = c²
c² = 106
c = √106 cm
Ob. = 5 cm + 9 cm + √106 cm = (14 + √106) cm
