# In an isosceles triangle ABC with base AB, find the sides if the perimeter is 3.4 m. BC is 1.3 m.

June 30, 2021 | education

| The perimeter of a triangle is equal to the sum of all its sides. Since the triangle is isosceles, its sides are equal:

then BC = AC = 1.3 m;

P = AB + BC + AC = AB + 2 BC;

Base of triangle:

AB = P – 2 BC = 3.4 – 2 * 1.3 = 3.4 – 2.6 = 0.8 (m);

Answer: AB = 0.8 m; AC = BC = 1.3 m.

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