Question
PSLE
The perimeter of figure BCDEF is (5 r + 21) cm. The perimeter of square BCDE is 16 cm.
  1. Find the perimeter of triangle BEF in terms of r.
  2. The perimeter of figure BCDEF is 61 cm. What is the value of r? Give your answer in cm.
3 m
(a)

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(b)

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PSLE
The perimeter of figure BCDEF is (5 r + 21) cm. The perimeter of square BCDE is 16 cm.
  1. Find the perimeter of triangle BEF in terms of r.
  2. The perimeter of figure BCDEF is 61 cm. What is the value of r? Give your answer in cm.