Question

Dari gambar di samping, diketahui CD= 20 cm dan AD= 7 cm.
Hitunglah: a. panjang BA
b. panjang BC
c. panjang BD.
(plis dijawab ya temanteman besok harus dikumpulin:(( )

Answer 1

CD = 20 cm
AD = 7 cm
AC = CD + AD = 27 cm

a)
BA² = AD x AC
BA² = 7 x 27
BA² = 189
BA = √189
BA = 3√21 cm

b)
BC² = CD x AC
BC² = 20x 27
BC² = 540
BC = √540
BC = 6√15 cm

c)
BD² = AD x CD
BD² = 7 x 20
BD² = 140
BD = √140
BD = 2√35 cm