The triangle ABC is isosceles triangle, ∠ a = 86 °, 1 = 2, 3 = 4, find the degree of ∠ 5

The triangles ABC are isosceles triangles. It is explained that the two interior or exterior angles of isosceles are ∠ 1 and ∠ 2, ∠ 3 and ∠ 4. The angle ∠ a has 86 ° and can't be the other two isosceles angles, but can only be the top angle. Then, ∠ 1 = 2 = 47 ° or 133 °, 3 = 4 = 133 ° or 47 °, 5 = 94 °

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