Question

544 pls dau multe puncte!!!

Answer 1

a) l=8

L=l+15=8+15=23

Perimetru=2l+2L=16+46=62

b) L=20

l=L/4 =20/4=5

Perimetru=2l+2L=40+10=50

c) L=148

l=3L/4=(3 ori 148)/4=111

Perimetru=2L+2l=222+296=518

d) L+l=280

Perimetru=2l+2L=2(L+l)=2 ori 280=560

l=2L/6

2L/6+L=280

2L+6L=1680

8L=1680

L=1680/8=210

l=280-L=280-210=70

Answer 2

Răspuns:

P=2(L+l)

a)l=8cm,L=8+15=23cm

P=2(8+23)=>P=62 cm

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b) L=20cm,l=20/4=5cm

P=2(20+5)=>P=50 cm

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c)L=148 cm,l=3/4 din 148=>l=148·3:4=>l=111 cm

P=2(148+111)=>P=518 cm

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d) L+l=280 cm

l=2L/6

L+2L/6=280 amplificam

8L=1680=>L=1680:8=>L=210 cm

l=2·210:6=70 cm

P=2(210+70)=>P=560 cm