Question

13)Each of two equal sides of a triangle is 3cm less than twice the third
side .If the perimeter of the triangle is 69cm, find the lengths of its
sides ?

Answer 1

Answer:

Let the third side be x

Two equal sides of a triangle = 2x - 3

Perimeter of the triangle = 69cm

Perimeter = 1st + 2nd + 3rd = 69

= (2x - 3) * 2 + 3rd side or x = 69

= 4x - 6 + x = 69

= 4x + x = 69 + 6

5x = 75 cm

x = 75/5

Third side = 15 cm

Explanation:

1st and 2nd sides are 2x - 3 = 2*15 -3

= 27 cm (values of both equal sides )

For checking,

27 cm +27 cm + 15 cm = 69 cm

Please mark as brainlist answer.