Question

Two sides of a triangle are 15cm and 20cm respectively. The perimeter of the triangle is 50cm. What is the lenght of the third side?

Pls giv explanation.

Answer 1

Answer:

perimeter of triangle= length of (1st side + 2nd side + 3rd side)= 50cm

15cm+20cm+ 3rd side = 50cm

35cm +3rd side =50cm

3rd side= 50cm-35cm = 15cm

Answer 2

Answer:

Let the third side be x.

According to the question,

Perimeter of the triangle = 50m

15 + 20 + x = 50

35 + x = 50

x = 50 - 35

x = 15 cm

So, the third side of the triangle is 15cm

I hope you will find it helpful.

Thank You