In an isosceles triangle ABC, base angle = 35 degrees. Find apex angle B [or angle ABC].
| August 5, 2021 | education
Since the triangle ABC is isosceles, AB = CB, the angles at the base of the AC are equal.
Angle BAC = BCA = 35.
The sum of the inner angles of the triangle is 180, then the angle ABC = (180 – BAC – BCA) = (180 – 35 – 35) = 110.
Answer: The angle at the vertex B is 110.
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