The side of an isosceles triangle is 39 and the base is 72, find the area of this triangle.

Solution: So, to find the area of a triangle, you need to know the formula to calculate it.
This formula looks like this: S = ½ a * h, where a is the base, h is the height.
As you know, the height of an isosceles triangle, drawn from top to base, is the median.
In triangle ABC, the base will be AC, and the height will be BM.
MS length = 72/2 = 36.
Next, we find the length of the BM by the Pythagorean theorem: BM ^ 2 = 39 ^ 2 – 36 ^ 2 = 1521 – 1296 = 225.
VM = 15.
Area of a triangle: S = ½ * 72 * 15 = 1080/2 = 540.
Answer: 540.