Geometry

Question Analysis:
This question tests true and false properties of isosceles triangles.
The main focus is on identifying a statement that contradicts the definition.

Key Concept Explanation:
An isosceles triangle has two equal sides and two equal angles.
The perpendicular bisector of the base always passes through the vertex.

Step-by-Step Solution:
A) ✅ (True) – An equilateral triangle is a special case of an isosceles triangle where all three sides are equal.
B) ✅ (True) – The base angles of an isosceles triangle are always equal.
C) ✅ (True) – The perpendicular bisector of the base always passes through the vertex in an isosceles triangle.
D) ❌ (False) – The two equal sides must al...