![]() ![]() This means that the perpendicular bisector of the base is also the line of symmetry of the triangle. Perpendicular Bisector: The perpendicular bisector of the base of an isosceles triangle passes through the vertex angle and divides the base into two equal parts.This means that if you fold an isosceles triangle along this line of symmetry, the two halves will be congruent. Symmetry: Isosceles triangles have a line of symmetry that passes through the vertex angle and bisects the base.The vertex angle is the angle formed by the two legs of the triangle, and it is always larger than the base angles. ![]()
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