a) AB=2dm =20 cm
AC= √5 cm
BC=?
In ∆ABC dr=>T. P AB²+ AC²=BC²
20²+√5²=BC²
BC² = 400+√25
BC²=400+5
BC ²= 405
BC=√405
BC=9√5 cm
b)
AC=6dam= 6000cm
BC=10dam= 10000 cm
In ∆ABC dr=>T. P AB²+ AC²=BC²
AB²+6000²= 10000²
AB²=10000²-6000²
AB²=640000
AB=√640000
AB=8000 cm
C)AB=5m=500 cm
AC=12m= 1200 cm
In ∆ABC dr=>T. P AB²+ AC²=BC²
500²+1200²=BC²
BC²= 1690000
BC= √1690000
BC = 1300 cm
D)AB=5mm=50 cm
BC=7mm=70 cm
In ∆ABC dr=>T. P AB²+ AC²=BC²
50²+AC²=70²
AC²= 70²-50²
AC²= 4900-2500
AC²=2400
AC=√2400
AC= 20√6