Răspunsuri

2014-04-24T09:31:55+03:00
A = 90 grade ( unghi drept)
B/5 = C/13 ( asta inseamna ca sunt direct proportionale)
B + C = 90 grade | : 5
B/5 + C/5 = 18 grade
C/13 + c/5 = 18 grade(aducem la numitorul comun 65 amplificand prima fractie cu 5 si a doua cu 13)
5C/65 + 13C/65 = 18 grade
18C/65 = 18 grade
C =  65 grade
B = 90 - 65 = 25 grade

1 5 1
2014-04-24T09:40:29+03:00
A, B, C - unghiuri
tr dreptunghic=> A=90 grade

90+B+C=180
B+C=180-90
B+C=90

B=5K
C=13K

5K+13K=90
18K=90
K=90:18
K=5

B=5*5 B=25 grade
C=13*5 C=65 grade