jawablah pertanyaan berikut dengan benar

jawabannya aku tidak tahu

7.
a. DE/AB = CE/CE+EB
5/7 = 6/6+EB
6+EB = 6×7/5
6+EB = 8,4
EB = 8,4 - 6
EB = 2,4 cm

b. anggap saja segitiga ABC itu sama dengan segitiga EBD
AC=ED
BC=BD
AB=EB

BC/BD = AB/BE
BC/6 = 8/4
BC = 2×6
BC = 12 cm

BC-BE = EC
12-4 = 8 cm

8.
SM×PQ+MP×SR/SM+MP =
5×20+3×12/5+3 =
100+36/8 =
136/8 = 17 cm

9.
a. ∆ABC=∆ABD

b. <ABC=<ADB
<BAC=<BAD
<ACB=<ABD

c.CA=BA
BC=BD
AB=AD

d. BA/CA=AD/BA
BA×BA=50×32
BA²=1600
BA=√1600
BA=40 cm

BC/BD=AD/BA
BC/24=50/40
BC= 50×24/40
BC=30 cm

BD =24 cm

BD nya pakai rumus pitagoras

maaf kalo salah