diketahui panjang pt 6cm,sr 28 cm dan qr 21 cm berapakah panjang sv ...

Dik :
PT = 6 cm
SR = 28 cm
QR = 21 cm

Dit : SV = ...?

Jb.
PQ = SR : 2
PQ = 28 cm : 2
PQ = 14 cm

ST = QR - PT
ST = 21 cm - 6 cm
ST = 15 cm

QR/ST = 21 cm / 15 cm = 7/5

TU = 14 : 7/5
TU = 14 × 5/7 = 2 × 5
TU = 10 cm

PQ/RS = 14 cm / 28 cm = 1/2

SV = 10 cm : 1/2
SV = 10 × 2
SV = 20 cm