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Given: Points P, Q, and R are collinear, and Q is the midpoint of . a. If PQ = 8 cm, then QR = _____. b. If PR = 21 cm, then PQ = _____.​

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Answers:

QR = 13 cm

PQ = 8 cm

Solutions:

P,Q and R are Collinear means they're at the same line.

Solution for QR:

  • PR is 21 cm, then subtract 8 from 21.
  • 21 - 8 = 13

Solution for PQ:

  • PR is 21 cm, then subtract 13 from 21.
  • 21 - 13 = 8

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