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Describe how to identify the vertex angle of an isosceles triangle.
(a)The vertex angle is the smallest angle in the triangle.
(b)The vertex angle is the largest angle in the triangle.
(c)The vertex angle is the angle formed by the congruent sides, or legs, of the triangle.
(d)The vertex angle is one of two congruent angles of the triangle.

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keani55

Answer

is (d)The vertex angle is one of two congruent angles of the triangle.

Step-by-step explanation

Explanation: Every triangle has 180 degrees. An isosceles triangle has one vertex angle and two congruent base angles. Thus, 65 is the base angle and 50 is the vertex angle.

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