Question

the perimeter of a triangle is 75cm.two of the sides are 20cm
and 30 cm, find the third side
​

Answer 1

Answer:

The third side=

perimeter-(the first +second side)

=75-(20+30)

=75-50

=25

so the the third side is 25

Answer 2

Answer:

25cm

Step-by-step explanation:

given:

perimeter of a triangle=75cm

two sides of triangle are given

30cm and 20cm

now,

perimeter of triangle=sum of all sides

75 = 30+20+side3

75 = 50+side3

75-50=25

so,the third side is 25 cm

hope it helps you