Question

Calculati perimetrul triunghiului ABC,daca:
a)AB=AC=BC=9,7 cm;
b)AB=2AC=16 cm, BC=10,6 cm;
c)AB=0,8(AC+BC)=12 cm;
d)AB+AC=15 cm, AB+BC=16 cm, AC+BC=17 cm. Imi trebuie repede va rog

Answer 1

a) Pabcd= AB+BC+AC= 9,7•3= 29,1 cm
b) AC=16:2=8
Pabcd= 16+8+10,6= 34,6 cm
c) Pabcd= 0,8+12= 12,8 cm
d) AB+AC+AB+BC+AC+BC=15+16+17=
2AB+2AC+2BC=48 /:2
AB+BC+AC=24 cm

Answer 2

Răspuns:

Permiterul reprezinta suma laturilor.

PABC=AB+AC+BC

a)PABC=9,7x3=29.1 cm

b)AC=16/2=8 cm

PABC=16+8+10,6

PABC=34,6 cm

c)AB=12cm

AC+BC=12:0,8=12*10/8=120/8=15 cm

PABC=12+15=27 cm

d) AB+AC=15cm

AB+BC=16cm

AC+BC=17cm

AB+AC+AB+BC+AC+BC=15+16+17

2AB+2AC+2BC=48 cm

2x(AB+AC+BC)=48

AB+AC+BC=48:2

PABC=24 cm

Explicație pas cu pas: