tolong bantu saya kak pkek cara..

a.pq =6
lm=25
mn=10
itu jawabannya

PQ/PS = KL/KN
PQ/15 = 6/3
PQ/15 = 2
PQ = 2x15
PQ = 30 cm

LM/KN = QR/PS
LM/3 = 25/15
LM/3 = 5/3
LM = 5/3 x 3
LM = 5 cm

MN/KN = RS/PS
MN/3 = 10/15
MN/3 = 2/3
MN = 2/3 x 3
MN = 2 cm

b.)
Luas PQRS
= (PQ+RS)/2 x PS
= (30+10)/2 x 15
= 40/2 x 15
= 20x15
= 300 cm²

Semoga bermanfaat. ^_^ **