Jawabanmu

2014-04-10T21:32:24+07:00
Jika AB =AC ,maka BC =2√2

AB.AC/2 =AD.BC/2
2.2/2=AD.2√2/2
2=√2 AD
AD = 2/√2 atau 2√2/2 = √2
2014-04-10T21:53:30+07:00
AB =AC,  BC =2√2

AB x AC/2 =AD x BC/2
2 x 2/2=AD x 2√2/2
2=√2 AD
AD = √2/2 = √2