Question

the size of a triangle are X cm, (X-5)cm and (X+3)cm long. if the perimeter is 25 cm, find the length of the three sides?​

Answer 1

Explanation:

let's be more detailed than the other answer :

the perimeter is the sum of all sides of an object. in case of a triangle, well, that is the sum of all 3 sides.

so,

25 = x + (x-5) + (x+3) = x + x - 5 + x + 3 = 3x - 2

27 = 3x

x = 9

so, the sides are

x = 9 cm

(x-5) = 9 - 5 = 4 cm

(x+3) = 9 + 3 = 12 cm

Answer 2

25 = 3x - 2
27 = 3x
9 = x

side one: 9
side two: 4
side three: 12