Question

Find the third side of a triangle whose perimeter is 60cm and two it's sides are 20cm and 30cm​

Answer 1

10cm

Step-by-step explanation:

Perimeter of traingle = 60cm.

Two sides = 20+30 = 50cm

Third side = 60–50 = 10cm

Answer 2

Answer:

Step-by-step explanation:

Given:-

Perimeter= 60cm

One side of the triangle = 20 cm

The second side of the triangle = 30cm

Third side = ? Let the third side be x.

Perimeter of the triangle is equal to sum of all the side of it .

So,

20 + 30 + x = 60

50 + x = 60

x = 60–50

x = 10 cm

The third side is equal to 10 cm