jawab poinnya 25 lho
Jawab:
segitiga
cara#SMP
ΔABD siku di B , <D = 30
maka perbandingan=
AB/1 = AD/2
AB = 1/2 AD
AB = 1/2 (20√2)
AB = 10√2
ΔABC siku di B , <C = 45
AB/1 = AC/√2
10√2 = AC/√2
AC= 10√2 (√2)
AC = 20(2)
AC = 40 cm
#SMA, pakai trigonometri
