hitunglah.panjang a.PT b.QR c.PS

1. pt = pr-tr = 12-4 = 8
2. pt/pr = ts/qr
8/12 = 10/x
2/3 = 10/x
2x = 3.10
2x = 30
x = 30/2=15
3. st/qr = ps/pr
10/15 = x/12
2/3 = x/12
3x = 12.2
3x = 24
x = 24/3 =8

a)
PT = PR - TR
PT = 12 cm - 4 cm
PT = 8 cm

b)
ST/QR = PT/PR
10/QR = 8/12
10 × 12 = 8 × QR
120 = 8QR
QR = 120/8
QR = 15 cm

c)
PS/ST = PR/QR
PS/10 = 12/15
PS × 15 = 12 × 10
15PS = 120
PS = 120/15
PS = 8 cm