Question

Un paralelogram cu masurile unghiuriloc C si D invers proportionale cu 1, (6) si 2, 5
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Answer 1

1,(6) = 15/9 = 5/3 
2,5 = 25/10 = 5/2 

< A = < C  =  3k/5
<D = <B  = 2k/5 

3k/5 + 3k/5 + 2k/5 + 2k/5 = 360  / x5 
3k + 3k + 2k + 2k = 1800
10k = 1800 
k = 1800 : 10 = > 180 
<A = <C = (3x180)/5 = 540/5 = 108 grade 
<B = <D = (2x180)/5 = 360/5 =  72 grade 

Answer 2

{C,D} i p {1,(6);2,5}
=> C/1/1,6=D/1/2,5
=> 1,(6)C=2,5D
15C/9=25D/10
=> C=225D/150
C=3D/2

stim ca C+D=180°
=> 3D/2+D=180°
     5D=360°
D=72°
=> C=108°