Question

ma ajutati si pe mine la problema aceasta:Fie triunghiul SPR si TQ ΙΙ RP
a) daca TQ=0,5dm Pr =1,5 dm si Sq =4cm calculati QR

Answer 1

$TQ||PR\Rightarrow(T.F.A.)\Delta STQ\sim\Delta SPR\Rightarrow\frac{TQ}{PR}=\frac{SQ}{SR}$

${SR}\Rightarrow\frac{0,5}{1,5}=\frac{0,4}{SR}\Rightarrow$

$\Rightarrow SR= \frac{1,5\cdot0,4}{0,5} =1,2 dm\Rightarrow$
$QR=SR-SQ=1,2-0,4=0,8dm=8cm$