The sides of a triangle are in the ratio 3:5:7 and ita perimeter is 45 cm. wht are the lengths of the sides?​

2 thoughts on “The sides of a triangle are in the ratio 3:5:7 and ita perimeter is 45 cm. wht are the lengths of the sides?​”

1. ratio of sides = 3: 5 : 7

   sum of sides = perimeter

   3x +5x + 7x = 45

   15 x = 45

   x = 45 / 15

   = 3

   sides

   3x = 3 × 3 = 9 cm

   5 x = 5 × 3 = 15 cm

   7x = 7 × 3 = 21 cm

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2. A+B+C = Perimeter

   LET THE RATIO BE X

   3x+5x+7x = 45

   15x = 45

   x = 45/15

   x = 3

   Sides

   1. 3x = 3×3 = 9

   2. 5x = 5×3 = 15

   3. 7x = 7× 3 = 21

   Reply