Question

. Two sides of a triangle are 8 cm and 12 cm Find the
measure of third side, if the perimeter of the triangle
is 31 cm.​

Answer 1

Answer:

(A) a + 2b = 3ab

(C) a - 2b = 3ab

(B) 1 + 2ab = 3b

(D) 3b + 1 = 2ab

Answer 2

Answer:

11

Step-by-step explanation:

let the side be x

8+12+x=31

20+x=31

x=31-20

x=11