Question

find the length of the third side of the triangle if its perimeter is 20 and two of its side measure 3.5 cn and 9 cm

Answer 1

Let the third side of a triangle = x cm

Perimeter of a triangle = 18+20+x=60 cm

38+x=60

x=60 - 38

x=22 cm

Therefore, the length of the third side of the triangle = 22 cm

Answer 2

Answer:

perimeter:20 cm

MEASURE OF TWO SIDES : 3.5CM AND 9 CM

let the measure of third side be x

perimeter= 20

3.5 + 9 + x = 20

12.5 + x = 20

x = 20-12.5

x = 7.5

therefore the value of third side be 7.5cm