Question

初三上册数学第四章相似三角已知,b分之a=d分之c=f分之g=5分之4且b+d-2f不等于0,求b+d-2f分之a=c-

Answer 1

a=0.8b,c=0.8d,g=0.8f

(a+c-2e)/(b+d-2f)=(0.8b+0.8d-1.6f)/(b+d-2f)=08(b+d-2f)/(b+d-2f)=0.8