Question

If the sides of a triangle are 3cm and 4cm and perimeter of the triangle is 11cm. find the third side?​

Answer 1

Answer:

4 cm

Step-by-step explanation:

Given:

• Two sides of a triangle = 3 cm and 4cm
• Perimeter of triangle = 11 cm

To find:

• Third side = ?

Solution:

Let the third side be 'x'.

We know that perimeter of a triangle = a + b + c (Where, a, b and c are the sides of triangle).

$\longrightarrow$ 11 = 3 + 4 + x

$\longrightarrow$ 11 = 7 + x

$\longrightarrow$ 11 - 7

$\longrightarrow$ Third side = 4 cm.