Răspuns :
a+a+1 + a + 2 = 399
3a + 3 = 399
3a = 399 - 3
3a = 396
a=396 : 3
a= 132
b= 133
c=134
P = 132 +133 +134 =399 cm
3a + 3 = 399
3a = 399 - 3
3a = 396
a=396 : 3
a= 132
b= 133
c=134
P = 132 +133 +134 =399 cm
a, b, c -laturile
a+b+c=399
a+a+1+a+1+1=399
3a+3=399
3a=399-3
3a=396
a=396:3
a=132 cm
b=a+1=132+1=133 cm
c=a+1+1=132+1+1= 134 cm
a+b+c=399
a+a+1+a+1+1=399
3a+3=399
3a=399-3
3a=396
a=396:3
a=132 cm
b=a+1=132+1=133 cm
c=a+1+1=132+1+1= 134 cm