Question

If the two sides of a triangle are greater than 5 and 7 cm more than the third side and the perimeter of the triangle is 21 CM so what is the length of each CM each side

Answer 1

Answer:

a = 3 + 5 = 8 cm

b = 3 + 7 = 10 cm

c = 3 cm

Step-by-step explanation:

let the length of third side be , c = x cm

so, length of first side ,a = (x + 5) cm

length of second side ,b = (x + 7) cm

perimeter = (a+b+c)

x + (x + 5) + (x+7) = 21

3x + 12 = 21

3x = 21-12 = 9

so, x = 9/3 = 3 cm

hence, a = 3 + 5 = 8 cm

b = 3 + 7 = 10 cm

c = 3 cm

Answer provided by GauthMath.