IN MATH: 1. n. point at which sides of an angle intersect or meet; the "corner point" of an angle; the common endpoint of the 2 rays whose union is an angle. EX. A triangle has three vertices, a quadrilateral has four, a pentagon has five, etc. 2. n. the maximum or minimum point on a parabola, its only point on its axis of symmetry.

IN ENGLISH: 1. n. peak, highest point. EX. We climbed to a vertex of the mountain and it alone was snow covered.

APPLICATION: See list 140.

1. Name the vertices of triangle ABC.

2. What's the vertex of the angle opposite side b in triangle ABC?

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