Question

8. The perimeter of a triangle is 48 cm. If its
sides are in the ratio 3:4:5, find the length of
each side.
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Answer 1

Let us assume the constant multiple be x

Now, measure of all the three sides be 3x, 4x, 5x

As it's a triangle it's perimeter will be

Perimeter = 1st Side + 2nd Side + 3rd Side

48 cm = 3x + 4x + 5x

48 cm = 12x

x = 48/12

x = 4 cm

Finding Sides

1st Side = 3x = 3(4) = 12 cm

2nd Side = 4x = 4(4) = 16 cm

3rd Side = 5x = 5(4) = 20 cm

• 1st side is 12 cm, 2nd Side is 16 cm and 3rd Side is 20cm