Question

va rog mult am testare
dau coroana​

Answer 1

1. A) Aria ABCD=30m × 40m=1200m patrati

B) casa+ piscina = 120+34=154 m patrati

C) aria gradina = 1200-154=1046 m patrati

La ex 2

L=4,2dm=0,4m (cred ca ii greseala, nu are cum.lungimea sa fie mai mica decat latimea dar noi facem calculele dupa datele acestea)

l=5,3m

P=2×(0,4+5,3)=11,4

Aria=0,4×5,3=2,12m patrati

l=6cm

P=420mm=42cm

Atunci

P=2xl+2×L rezulta 42=2×6+2×L

2xL=42-12 rezulta Lungimea=30:2=15 cm

Aria=l×L=6×15=90 cm patrati

L=12m=120dm

P=360dm

360=2×latime+2×120

latime=(360-240):2=120:2=60dm

Aria=120×60=7200dm patrati

L=2400cm=24m

Aria=144m patrati

144=latime×24

latimea=144:24=6m

P=2(24+6)=60m