Question

Problema 13 ...va rog 100 PCT ...NUMAI SA MI SCRIETI + CORIANA
URGENT!!

Answer 1

a)
P=AM+MB+AB

ADM=tr. dreptunghic, aplicam Pitagora, AM^2=AD^2 +DM^2=16+1=17
AM=V17 cm, "V"=radical

BMC=tr. dreptunghic, aplicam Pitagora,MB^2 =BC^2 +MC^2=9+16=25
MB=5cm

P=4+5+V17=9+V17 cm

13,1<9+V17<13,2 scadem 9

4,1<V17<4,2 ridicam la patrat

16,81<17<17,64 adevarat

b) 
A(ABM)=[A(ABCD)]/2=(4x4)/2=8 cm^2

c)
Fie A' apartinand lui MB, astfel incat AA'_l_MB.

A(AMB)=8 cm^2
A(AMB)=(AA'xMB)/2=(5xAA')/2

8=(5xAA')/2

AA'=16/5=3,2 cm