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  • 3 years ago

if an isosceles triangle has an altitude from the vertex to the base,then the altitude bisects the vertex angles

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  1. mathstudent55
    • 3 years ago
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    |dw:1355265639718:dw| By AAS the triangles ABD and ACD are congruent, so angles BAD and CAD are congruent and the altitude is the bisecotr of the vertex angle.

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