Question

7. If perimeter of a triangle is
45cm and its sides are given in
the ratio 2:2:1. find the length ofthe sides.
O 18,18,9
O 2,2,1
O 6,6,8
O 5,5,5​

Answer 1

Answer:

18,18,9

Step-by-step explanation:

Let, the sides be 2x, 2x and x.

Perimeter = Sum of all sides

45 = 2x+2x+x

45=5x

x=9

2x=18

Answer 2

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18cm , 18cm , 9cm are the sides respectively

Step-by-step explanation:

Let the sides of the triangle be 2x , 2x , 1x

Given

• Perimeter = 45cm
• To find the length of sides .

We know that perimeter of a triangle = side + side + side

So here sides are 2x , 2x , 1x

So, Perimeter = 2x + 2x +1x = 45cm

==> 5x = 45cm

==>x = 45/ 5

==>x = 9cm

So the sides are

• 2x = 2 × 9 = 18cm
• 2x = 2× 9 = 18cm
• 1x = 1 × 9 = 9cm

Checking = perimeter =Side + Side + Side = 18 + 18 + 9cm's= 45cm