Question

If the perimeter of a triangle is 12 cm and any two sides are of length 4 cm and 3 cm then the length of the third side will be :
1- 19 cm
2- 5 cm
3- 12 cm
4- 7 cm

Answer 1

19 cm is the answer because

Answer 2

Step-by-step explanation:

Given:

Perimeter = 12cm

1st side = 4cm

2nd side = 3cm

Let the third side of triangle be x

1st side + 2nd side + 3rd side = perimeter of the triangle

4cm + 3cm + x = 12cm

7cm + x = 12cm

x = 12cm - 7cm

x = 5cm

hence, the third side is 5cm