Question

The sides of triangle are in the ratio 3:4:5 and it's perimeter is 84cm. Find the length of it's sides.
Please Answer!!​

Answer 1

Step-by-step explanation:

let the side the triangle be 3x,4x and 5x

perimeter of a triangle is sum of the sides

= 3x+4x+5x=84

= 12x= 84

= x =84/12

= x = 7

first side= 3×7 = 21cm

second side = 4×7=28cm

third side = 5×7=35cm

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Answer 2

Answer:

sides are 21 cm , 28 cm and 35 cm

Step-by-step explanation:

let the common multiple between the ratios be x

3x + 4x + 5x = 84 cm  (formula of perimeter)

12x = 84 cm

x = 7 cm

side 1:

3x

= 3 * 7

= 21 cm

side 2:

4x

= 4 * 7

= 28 cm

side 3:

5x

=5 * 7

= 35 cm

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