Question

1 The sides of a triangle are in the ratio
3:4:5 and its perimeter is 84 cm. Find
the lengths of its sides.​

Answer 1

Answer:

Step-by-step explanation:

let 3x+4x+5x=84

so 12x=84

x=84/12

=7

3*7=21

4*7=28

5*7=35

Answer 2

Step-by-step explanation:

ratio of the triangle =3:4:5

perimeter of the triangle =84cm

sum of the ratios =3+4+5

=12

$length \: of \: first \: side = \frac{3 \times 84}{12} \\ = 21cm$

$length \: of \: second \: side \: = \frac{4 \times 84}{12} \\ = 28cm$

$length \: of \: third \: side \: = \frac{5 \times 84}{12} \\ = 35cm$

Hope it helps you..