Question

construct a triangle ABC whose perimeter is 12cm and side are in the ratio 3: 4: 5

Answer 1

The perimeter of triangle

= side ×side ×side

Perimeter = 12

Let the three sides be 3x ,4x ,5x

= 3x + 4x + 5x = 12

= 12 x =12

= x = 12 /12

=x = 1

The three sides are

3x= 3×1 =3

4x= 4×1 =4

5x= 5×1 =5

Hope this will help..