(1)设三个面积分别为a,b,c
则有c/a=3/7,即a=7c/3;
c/b=2/5,即b=5c/2
a:b:c=7c/3:5c/2:c=14:15:6
(2)
a:b=14:15
将a+2=b代入
有a:(a+2)=14:15,
a=28
b=30
(1)设三个面积分别为a,b,c
则有c/a=3/7,即a=7c/3;
c/b=2/5,即b=5c/2
a:b:c=7c/3:5c/2:c=14:15:6
(2)
a:b=14:15
将a+2=b代入
有a:(a+2)=14:15,
a=28
b=30