The perimeter of an isosceles triangle is 60 cm and its lateral side is 18 cm, find the base of the triangle.
| April 25, 2021 | education
To solve this problem, remember that an isosceles triangle is a triangle in which two sides and angles at the base are equal. The perimeter of a triangle is equal to the sum of the lengths of all its three sides. We calculate what the base is equal to, knowing that the side is 18 cm, and the perimeter is 60 cm.
a = 60 – 18 * 2 = 60 – 36 = 24 cm.
Answer: 24 cm.
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