如图,在Rt△ABC中,∠C=90°,AC+BC=2 3 ,S △ABC =1,则斜边AB的长为______

2024-11-21 23:47:40
推荐回答(1个)
回答1:

∵S △ABC =
1
2
AC?BC=1
∴AC?BC=2
∵AC+BC=2
3

∴(AC+BC) 2 =AC 2 +BC 2 +2AC?BC=AB 2 +2×2=(2
3
2 ,∴AB 2 =8
∴AB=2
2