Question

Raportul masurilor a doua unghiuri suplimentare este egal cu 5/7. Sa se afle masurile celor doua unghiuri.

Answer 1

Le notam a si b.
a+b=180°
a/b=5/7

a=180-b
7a=5b

a=180-b
7(180-b)=5b

a=180-b
1260-7b=5b

a=180-b
-7b-5b=-1260

a=180-b
-12b=-1260

a=180-b
12b=1260

a=180-b
b=1260/12=104

b=104
a=180-104=76

Answer 2

x/y =5/7  ;   7x =5y  ;   x =5y/7
x+y =180

5y/7 + y =180   numitor  7

5y +7y =1260
12y =1260
y =105  grade
x+105 =180
x =180-105 =75 grade