Question

V arog daca nu stitu nu faceti mersi

Answer 1

    
[tex]6)~~~\ \textless \ C = \ \textless \ C (unghi comun) \\ \ \textless \ A = \ \textless \ BDC \\ Suntem ~in~cazul~UU~de~asemanare. \\ =\ \textgreater \ \Delta CDB \sim \Delta CAF \\ \text{Atentie la ordinea in care scrii literele} \\ CBD \sim \Delta CAF Adica~~~ CDB \sim \Delta CAF~~~dar ~~~ CBD \nsim \Delta CAF ~~(nu~e)[/tex]


[tex]7) \displaystyle \\ AB = 5\;cm \\ \\ AC = \frac{2}{9}\times 5 = \frac{10}{9}\;cm = 1,(1) \;cm \\ \\ CD = \frac{5}{9}\times 5 = \frac{25}{9}\;cm =2,(7)\;cm\\ \\ BD = \frac{2}{9}\times 5 = \frac{10}{9}\;cm = 1,(1) \;cm [/tex]


[tex]2)~~~\text{Suma unghiurilor intr-un patrulater }= 360^o\\ x = 360 - 90 - 90 - 142 = 180 - 142 = 38^o[/tex]