# Find the angle between the sides of an isosceles triangle if the angle at the base is 57 degrees.

January 24, 2021 | education

| Considering that an isosceles triangle has opposite sides, the angles at the base are equal to each other, and the total sum of the angles of any triangle is 180 ° (according to the theorem on the sum of the angles of a triangle – Euclid’s geometry theorem) we get: 180 – (57 + 57) = 66 °

Answer: the angle between the sides is 66 °.

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