The perimeter of an isosceles triangle is 18.8 m.Find its lateral side (in meters) if it is 2.8 m larger than the base.

univerkov | November 26, 2020 | education

Let x be the length of the base, then the length of the lateral side is x + 2.8.
P = x + 2 (x + 2.8) = 3x + 5.6
3x + 5.6 = 18.8
3x = 18.8-5.6
3x = 13.2
x = 13.2: 3
x = 4.4

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