Trójkąty równoboczne:
1. a= 11cm
Ob = 3 × 11cm = 33cm
2. a = [tex]4\frac{1}{3}[/tex] cm
Ob = 3 × [tex]4\frac{1}{3}[/tex] cm = 3 × [tex]\frac{13}{3}[/tex] cm = 13 cm
3. Ob = 9 cm
a = 9cm : 3 = 3cm
4. Ob = 60 m
a = 60m : 3 = 20m
5. a = x
Ob = 3 × x = 3x
6. Ob = 6 × c
a = (6 × c) : 3 = 6c : 3 = 2c
Trójkąty równoramienne:
1. a = 2cm
b = 4 cm
Ob = 2cm + 4cm + 4cm = 10cm
2. a = 1m
b= 6[tex]\frac{1}{2}[/tex] m
Ob = 1m + 6[tex]\frac{1}{2}[/tex] m + 6[tex]\frac{1}{2}[/tex] m =13m
3. Ob = 16m
b = 6m
a = 16m - 6m - 6m = 4m
4. Ob = 60cm
a = 10cm
b = 60cm - 10 cm = 50 cm
50 cm : 2 = 25 cm
5. a = x
b = y
Ob = x + y + y = x + 2y
6. a = y
b = x
Ob = y + x + x = y + 2x
