Question

find A,B and C if the perimeter of a triangle is 36 cm and its sides are in ratio A: B : C = 3 :4 : 5​

Answer 1

Answer:

The sides are 9cm, 12cm, 15cm

Step-by-step explanation:

Let,

The sides of triangle =

• 3x
• 4x
• 5x

Perimeter of triangle = sum of all sides

⇒ 3x + 4x + 5x = 36

⇒ 12x = 36

⇒ x = 36 / 12

⇒ x = 3

___________________________

★ Value of 3x:

⇒ 3 (3)

⇒ 3 × 3

⇒ 9

___________________________

★ Value of 4x:

⇒ 4 (3)

⇒ 4 × 3

⇒ 12

___________________________

★ Value of 5x:

⇒ 5 (3)

⇒ 5 × 3

⇒ 15

Therefore,

The sides are 9cm, 12cm, 15cm