Question

10) Calculati aria unui trapez avand
urmatoarele dimensiuni:
a) b=2cm B=5 cm h=4 cm
b) b=3cm B= 7 cm h=18 cm
c) B=5 cm b=2cm h=3cm

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Answer 1

Explicație pas cu pas:

A=(B+b)*h/2

a)5*2*4/2=10*2=20

b)7*3*18/2=21*9=189

ce)5*2*3/2=30/2=15

Answer 2

Răspuns:

a) (2+5)•4/2= 7•4/2= 24/2=12

b)(3+7)•18/2=10•18/2=180/2= 90

c) (5+2)•3/2= 10•2/2=20/2=10

Explicație pas cu pas:

A=(B+b)•h/2