Răspuns :
Răspuns:
3. <A+<P=90°
<P=90°-<A
<P=30°
<B+<Q=90°
<Q=90°-<B
<Q=48°
<C+<R=90°
<R=90°-<C
<R=89°60'-37°17'
<R=52°17'
5. <ABC+<CBD=90°
<ABC=<CBD=X°
Inlocuim in prima relatie si obtinem x°+x°=90°
2x=90
x=45°
<ABC=<CBD=45°
3)
∡P = 90° - 60° = 30°
∡Q = 90° - 42° = 48°
∡R = 90°-37°43' = 89°60' - 3743' = 52°17'
[tex]\it 5)\ x+x=90^o \Rightarrow 2x=90^o \Rightarrow x=90^o:2=45^o[/tex]