Question

Calculati perimetrul unui triunghi cu laturile de:
a) 7 dm 8 cm 9 mm;
b) 6 dm 9 cm 7 mm;
c) 5 dm 5 cm 5 mm;
d) 11 dm 9 cm 4 mm;
e) 5 dm 6 cm 7 mm;
f) 6 dm 8 cm 9 mm.

Answer 1

a)24 b)22 c)15 d)24 e)18 f)23

Answer 2

a)7dm=70cm;9mm=0.9cm
P=70+8+0.9=78.9cm
b)6dm=60cm; 7mm=7.7cm
P=60+9+7.7=76.7cm
c)5dm=50cm ;5mm=0.5cm
P=50+5+0.5=55.5
d)11dm=110cm;  4mm=0.4cm
P=110+9+0.4=119.4
e)5dm=50cm;  7mm=0.7cm
P=50+6+0.7=56.7cm
f)6dm=60cm;  9mm=0.9cm
P=60+8+0.9=68.9cm