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Երկրաչափություն

No332

ա) AB=4սմ

BC=11սմ

<B=900

S=?

S=11*4/2=22սմ2

բ) AB=12սմ

BC=3դմ=30սմ

<B=900

S=?

S=12*30/2=180սմ2

No333

AB=14սմ

<B=900

<C=450

S=?

<C=<A

BC=AB=14սմ

S=142/2=98սմ

No334

h1=h2

a1=a2*2

S1;S2=?

S1=h1*a1/2

S2= h2*a2/2

S1;S2= h1*a1/2: h2*a2/2=a1:a2=2

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