Question

two sides of a triangle are 12 cm and 20 cm the perimeter of the triangle is 40 cm what is the third side
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Answer 1

Answer:

8cm

Step-by-step explanation:

perimeter of triangle=sum of all the three sides

40=12+20+3rd side

40=32+3rd side

40-32=3rd side

3rd side=8cm

Hope it helps!!!

Answer 2

Answer:

let the third side be x

perimeter of traingle = sum of all side

40 cm = 12+20+ x

40 = 32+ x

x = 40-32

x = 8cm