Question

the length of three sides of a triangle are Xcm .X cm and 6 cm and the perimeter is 20 cm find x

Answer 1

perimeter = X + X + 6
20 = X + X + 6
20 - 6 = 2X
14 = 2X
X = 14/2
X = 7 cm

Answer 2

Perimeter of triangle = 20



X + X + 6 = 20


2X + 6 = 20



2X = 14


X = 7 cm.