Question

Ajutor ex 2 dau coronita
PLIZZ

Answer 1

a) AB = 0,5 dam = 5 m

BC = 30 dm = 3 m

AC = 4,2 m

PABC = 12,2 m

b) AB = 4 cm

BC = AB • 2 = 8 cm

AC = BC - 2 cm = 6 cm

PABC = 18 cm

c) AB = 10 m

BC = AB/2 = 5 m

AC = BC + 2500mm = 5 m + 2,5 m = 7,5 m

PABC = 22,5 m

d) AB = 36 dm

BC = 7/9 • AB = 7/9 • 36 - simplificam prin 9 =
7•4 = 28 dm

AC = 1/2 • (AB+BC) = 1/2 • 64 = 32 dm

PABC = 96 dm