sianphilpott15931 sianphilpott15931

07-06-2023
Mathematics

contestada

1. Suppose \( \triangle A B C \) is isosceles with \( \angle B=\angle C \). Let \( A^{\prime} \) be the midpoint of \( B C \). Prove that \( A A^{\prime} \) bisects the angle at \( A \) and that it is perpendicular to BC (so is the altitude at A ).

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