Question

7. The lengths of two sides of a triangle are 12 cm and 14 cm The perimeter of the
triangle is 36 cm What is the length of its third side?
& The perimeter of a regular pentagon is 100 cm. How long is is each side?​

Answer 1

Answer:

Let the third side be x

Perimeter =12+14+x

36=26+x

x=10

I don't know the next answer