Question

vă rog repede dau coroană​

Answer 1

Răspuns:

b/2=c/7=k=> b=2k; c=7k

b+c=90

2k+7k=90

9k=90=> k=90/9=10

=>b=2*10=20

c=7*10=70

Answer 2

<B/2=<C/7=k

=> <B=2k, <C=7k

<A+<B+<C=180

90+2k+7k=180

9k=90

k=10

=> <B=20°

=> <C=70°