Proof: Similar Triangles 4     
PQ = 6
QR = 6
SR = 4
P SQR
TS = 4
1. 
1. 
12 / 6 = TR / 4; 2 / 1 = TR / 4
TR = 8
PR = 6 + 6; PR = 12
PR = PQ + QR
PR / QR = TR / SR
PQ = 6
4 = TS
SR = 4
P SQR
QR = 6
PRT ~ QRS
R R
TR = SR + TS
8 = 4 + TS



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