Question

urgenttt pleaseee(!!!!​

Answer 1

Răspuns:

3. b)45grade

4. d) 12cm

5 d) 3/16

Answer 2

Răspuns:

Explicație pas cu pas:

3

⇒∡(AE, BE)=45°    ⇒b

4

d(C, (ADM))=CN ,   CN⊥AD

Teorema  3⊥  MD⊥CN      ⇒CN este⊥pe 2 drepte ∈ (ADM)  ⇒CN = d( C, planul (ADM)

 Aabcd=ABsin 60°AB=12²√3/2 cm²

Aabcd=CN·AB   ⇒ABsin 60°AB=CN·AB    ⇒CN=AB  sin 60°=12√3/2

CN=12√3/2=6√3cm   raspuns: b

5

T Thales

AM/AC=1/4     AM/(AM+MC)=1/(3+1)=1/4

Ampbq=Aabc-Aamq-Amcp

Ampbq=Aabc-Aabc/16-Aabc·9/16

Ampbq=Aabc(1-1/16-9/16)=Aabc·6/16       Aabc=Aabcd/2

Ampbq=Aabcd·6/2·16    ⇒Ampbq/Aabcd=6/32=3/16   raspuns: d