Question

Find the preimeter of rectangle whose lenght is 12m and diagonal 13m

Answer 1

• Length = 12 m
• Diagonal = 13 m

A/Q, √l²+b² = 13

   ⇒ l²+b² = 169

  ⇒ 12² + b² = 169

  ⇒ b² = 169 - 144

  ⇒  b² = 25

 ∴  b = 5

• Perimeter = 2(l+b)

                          = 2 (12+5) = 2 x 17 = 34 m

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Answer 2

the preimeter of this triangle is 34cm

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