Answer:
PQ = √((-2 - 4)² + (3 - 11)² = √((-6)² + 8²)
= √(36 + 64) = √100 = 10
QS = √((4 - 9)² + (11 - (-1))²) = √((-5)² + 12²)
= √(25 + 144) = √169 = 13
RS = √((12 - 9)² + (3 - (-1))²) = √(3² + 4²)
= √(9 + 16) = √25 = 5
PQ = 10, QS = 13, SR = RS = 5
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