Question

The perimeter of a triangle is 5a – 2b + 4. The sum of two sides of it is a – b. Find its third side. (3M)

Answer 1

Answer:

4a-b+4

Step-by-step explanation:

perimeter = 5a-2b+4.

sum of two sides AB and AC = a - b

third side is = ?

perimeter of a triangle = sum all the sides

5a - 2b + 4 = AB+BC+CA

5a-2b+4 = a-b + BC

5a-2b+4 - a-b = BC

(5a-a)-(2b-b)+4 = BC

4a-b+4. = BC

therefore the third side is 4a-b+4