The perimeter of an equilateral triangle is 40 cm more than the length of each of its sides. What is the length of each side of this equilateral triangle ?
Answer & explanation
Correct answer: option 4
According to the question,
Let the side of the equilateral triangle = a cm
The perimeter of an equilateral triangle = 40 + a
Perimeter of equilateral triangle = sum of all sides
= 40 + a = a + a + a
= 40 + a =3 a
= 40 = 3a - a
= 2a = 40
= a = 20cm