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Mathematics, 05.01.2021 18:30 mirandac9394

Perimetre şi arii_test - VII
1.Calculaţi(în cm2 ) :

a)Aria unui paralelogram cu baza de 20 cm şi înălţimea de 0,5dm .

b)Aria unui triunghi dreptunghic cu lungimile catetelor de 6 cm şi 0,8 dm.

c)Aria unui romb cu diagonalele de 12cm şi 16 cm.

d) Aria unui dreptunghi cu lăţimea de 5 cm şi lungimea egală cu triplul lăţimii.

e)Aria unui trapez dreptunghic cu baza mică de 10 cm, baza mare de 0,12 m şi latura perpendiculară pe baze de 2 cm.

f) Aria unui trapez cu înălţimea de 0,6m şi suma bazelor de 200cm.

17p 2) Suma dintre lăţimea şi lungimea unui dreptunghi este 134 cm ,iar dacă împărţim lungimea la lăţime, obţinem câtul 5 şi restul 14.Aflaţi aria dreptunghiului.

25p 3)Trapezul dreptunghic ABCD are AB||CD, AB
a)Realizaţi desenul

b)Calculaţi CD;

c)Calculaţi aria trapezului ABCD;

d)Calculaţi aria triunghiului BAD.

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Perimetre şi arii_test - VII
1.Calculaţi(în cm2 ) :

a)Aria unui paralelogram cu b...
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