Question

(4) Find the perimeter of the triangle with
given sides:
(i) 12 cm, 13 cm 15 cm?

please explain this question​

Answer 1

Answer:

Perimeter of a triangle =AB+BC+CA

=12+13+15

=40 cm

Answer 2

Answer :-

• The perimeter of triangle is 40cm.

Step-by-step explanation :-

To Find :-

• The perimeter of triangle

Solution :-

Given that,

• 1st side of triangle = 12cm
• 2nd side of traingle = 13cm
• 3rd side of triangle = 15cm

According the question,

As we know that,

Perimeter of triangle = Sum of all sides,

=> Perimeter = 1st side + 2nd side + 3rd side

=> Perimeter = 12cm + 13cm + 15cm

=> Perimeter = ( 12 + 13 + 15 ) cm

=> Perimeter = ( 25 + 15 ) cm

=> Perimeter = 40cm

• The perimeter of triangle is 40cm.

Points to remember :-

Some more information related to perimeter :-

• Area of triangle = √s(s-a)(s-b)(s-c)

• Semi-perimeter of triangle = ( side a + side b + side c ) ÷ 2

• Perimeter of triangle = Sum of all sides.